WO2015097683A1 - Positioner for the acquisition and quality control of radiographic images of knees in the fixed flexion position (radiolfixer) - Google Patents

Positioner for the acquisition and quality control of radiographic images of knees in the fixed flexion position (radiolfixer) Download PDF

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Publication number
WO2015097683A1
WO2015097683A1 PCT/IB2014/067387 IB2014067387W WO2015097683A1 WO 2015097683 A1 WO2015097683 A1 WO 2015097683A1 IB 2014067387 W IB2014067387 W IB 2014067387W WO 2015097683 A1 WO2015097683 A1 WO 2015097683A1
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Prior art keywords
markers
positioner
acquisition
radiolfixer
knees
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PCT/IB2014/067387
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French (fr)
Portuguese (pt)
Inventor
Luciana ANDRADE CARNEIRO MACHADO
Luciana COSTA SILVA
Sandhi MARIA BARRETO
Rosa WEISS TELLES
Evandro BARROS NAVES
Antonio MARCOS FATTORELLI CARNEIRO
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Universidade Federal De Minas Gerais - Ufmg
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Publication of WO2015097683A1 publication Critical patent/WO2015097683A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/04—Positioning of patients; Tiltable beds or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
    • A61B2090/3966—Radiopaque markers visible in an X-ray image
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/44—Constructional features of apparatus for radiation diagnosis
    • A61B6/4405—Constructional features of apparatus for radiation diagnosis the apparatus being movable or portable, e.g. handheld or mounted on a trolley

Definitions

  • the present patent application comprises a positioner for acquisition and quality control of radiographic image of knees in fixed flexion.
  • the device's design allows it to be adjusted quickly and easily so that it can be worn comfortably on adults of any size without the need for any accessories.
  • the positioner is equipped with special markers embedded in the body of the equipment that allow the operator to assess the adequacy of the angle of incidence of the x-ray beam by any operator without the need for similar software or technologies.
  • Radiographic examinations of the knees are often used to assist in the diagnosis of various diseases of the musculoskeletal system, as they show joint signs due to lack of integrity of the articular cartilage and changes in the underlying bone and joint margins.
  • There are several protocols for the acquisition of radiographic images of the knees and in all these protocols, the proper positioning of the individual to be radiographed and the adequacy of the x-ray beam angle are crucial for obtaining a good quality image. so that the exam does not need to be repeated (Osteoarthritis Initiative - OAI. Radiographic procedure manual for examinations of the hands & feet. Available at http://oai.epi-ucsf.org.).
  • SynaflexerTM is a device that allows comfortable knee positioning for x-rays only in individuals with medium and high stature, and allows the evaluation of x-ray beam angle only from SynaVuTM trademark software, restricted use of Synarc, Inc and may not be marketed (use of such technology is only permitted through a service agreement between interested parties and the submission of radiographic images to be analyzed directly to Synarc, Inc) (McCarrie R & Miller CG. X -Ray acquisition challenges in clinical trials: Challenges and solutions posed by the Synaflexer TM OARSI 2012 Poster Presentation, July 12-14, 2012, South Carolina, USA.).
  • SynaflexerTM is not possible in routine radiology clinics or limited funding research. Therefore, there is currently no single equipment on the world market that can be widely used in the scientific community and in the general population for the proper positioning of the knees to be radiographed, as well as to evaluate the adequacy of the x-ray beam angle.
  • the proposed invention is a device that solves the limitations of SynaflexerTM, as its innovative design allows the positioner height to be adjusted comfortably for individuals of any height, particularly those with crotch measurements. (groin-to-floor distance) over 50 cm without the need for any accessories.
  • the type and distribution of special markers embedded in the body of the equipment allow the readiness of the x-ray beam angle to be assessed during the examination by any reader without the use of software or technologies similar.
  • One of the types of markers present in the equipment also allows the examiner to easily calculate the magnification rate of the joint structures observed in the radiographic image, offering a more realistic assessment of the measurement of intra-articular spaces.
  • FIGURE 1 - Figure 1 shows the part entitled “L-piece” in front view and its constituent parts.
  • FIGURE 2 - Figure 2 shows the "L-piece" in side view and its constituent parts.
  • FIGURE 3 - Figure 3 shows the "L-piece" in top view and its constituent parts.
  • FIGURE 4 - Figure 4 shows the part entitled “rectangular part” in side view and its constituent parts.
  • FIGURE 5 - Figure 5 shows the two identical parts entitled “cylindrical parts" in front view.
  • FIGURE 6 - Figure 6 shows the two identical parts entitled “cylindrical parts" in side view.
  • FIGURE 7 - Figure 7 illustrates the fit between the parts (L-piece, rectangular part and cylindrical parts) in front view.
  • FIGURE 8 - Figure 8 illustrates the fit between the parts (L-piece, rectangular part and cylindrical parts) in side view.
  • FIGURE 9 - Figure 9 illustrates the side view of the assembly: radiographic positioner, positioned limb, radiographic chassis, and x-ray tube.
  • FIGURE 10 - Figure 10 illustrates the image from the use of the Radiographic Positioner (RADIOLFIXER) in which there is optimal visualization of the tibiofemoral joint space by overlapping the anterior and posterior margins of the medial tibial plateaus.
  • FIGURE 11 - Figure 11 shows a radiographic image from the use of "RADIOLFIXER” where the best coincidence between markers occurs closest to the articular interline (dashed line), which occurs when the x-ray beam forms an angle of 10 degrees to the ground, producing an ideal radiographic image.
  • FIGURE 12 - Figure 12 shows a radiographic image from the use of "RADIOLFIXER” where the best coincidence between markers occurs below and far from the articular interline (dashed line), which occurs when the x-ray beam forms an angle of 8 degrees to the ground.
  • FIGURE 13 - Figure 13 shows a radiographic image from the use of "RADIOLFIXER” where the best coincidence between markers occurs below and far from the articular interline (dashed line), which occurs when the x-ray beam forms an angle of 9 degrees to the ground.
  • FIGURE 14 - Figure 14 shows the right triangle formed from the distances between the markers and the angle formed between the x-ray beam and the ground, as well as the calculation for obtaining the distance between the markers.
  • FIGURE 15 - Figure 15 illustrates the phenomenon of magnification according to the position of the object to be studied on radiographic examination.
  • the present patent application comprises a positioner for acquisition and quality control of radiographic image of knees in fixed flexion.
  • the device's design allows it to be adjusted quickly and easily so that it can be worn comfortably on individuals of any size without the need for any accessories.
  • the positioner is equipped with special markers embedded in the body of the equipment that allow the operator to assess the adequacy of the angle of incidence of the x-ray beam by any operator without the need for similar software or technologies.
  • the device (RADIOLFIXER) consists of a set of transparent and molded acrylic pieces according to an exclusive design, the thickness of these pieces should be between 0.8 to 2 cm.
  • FIG. 1 there is the seamless “L” piece (1), the square (2) that makes up the base has dimensions 40 cm wide and 40 cm long, the rectangle (3) forming the The remaining part of the "L” piece, where the fixed guides (4) are attached, is 40 cm wide and 75 cm long.
  • the "L” piece are two fixed guides (4) glued 0.8 cm from the vertical symmetry axis (5) of the rectangle (3) from the square base, the space between the guides is 1.6 cm,
  • These guides are identical and have two holes (6) each to engage the cylindrical parts (7), the two holes (6) are positioned on each guide 35 cm and 45 cm, respectively, far from the lower edge of the same and over the axis of symmetry of the guide (8), the diameter of these holes is 1 cm.
  • the "L” part also has a "V” shaped part (9) with a 10 degree angle glued to the horizontal and vertical portions of the "L” part (1), the height of the measured "V” part from the square base of the "L” piece (1) is 19 cm, the distance from the point corresponding to the vertex of the 10 ° angle to the end of the "V” piece measures 27 cm.
  • the rectangular part (10) of the radiographic positioner is shown in figure 4, this part is composed of 32 stainless steel markers inlaid, 16 spherical markers in the front part (1 1) having a diameter equal to 4 mm, half their volume is immersed in the acrylic, these spherical markers are positioned over the anterior edge (11) of the rectangular part (10), the first and last spherical markers are positioned at 10 cm and 40 cm, respectively, from the lower base of the part. rectangular (10) with a ball spacing of 2.0 cm. There are also 16 cylindrical markers, horizontally positioned along the body of the rectangular piece at its back (13). These cylindrical markers are 2 mm thick and 1.4 cm long, half the volume of the cylindrical markers is embedded in the rectangular piece.
  • the first and last cylindrical markers are positioned at 9.0 cm and 39.0 cm, respectively, from the bottom edge of the rectangular part (10), with a spacing of 2.0 markers. cm.
  • the rectangular piece still has 9 holes (14) along its length, arranged on the vertical symmetry axis (12) with a diameter of 1 cm, the first and last holes are positioned at 4 cm and 40 cm, respectively, from the bottom edge of the rectangular part, the spacing between the holes is 5.0 cm.
  • the device also has two identical compact cylindrical parts (7), whose circle diameter in the longitudinal cross section is 1 cm and the length of the part is 5.5 cm, as shown in Figure 5.
  • the rectangular part (10) is joined to the "L” part by means of the cylindrical parts (7) which simultaneously fit into the holes (6) contained in the fixed guides and also in two of the nine holes that compose it.
  • (6) and (14) this assembly of the parts characterizes the radiographic positioner "RADIOLFIXER", the front and side views of the radiographic positioner are arranged, respectively, in figures 7 and 8.
  • the "RADIOLFIXER” device is positioned in front of the chassis containing the radiographic film (15) so that there is no space between it.
  • the rectangular piece (10) must be fixed to the "L” piece through the compact cylindrical pieces (7) in a position compatible with the measurement of the leg-to-leg (groin-to-floor distance) of the individual to be radiographed, as the Rectangular piece (10) can move vertically through the fixed guides (4) glued to the "L” piece (1) so that the position in which it will be suspended can be conveniently chosen according to the between-leg measurement. providing an adequate position of the limb and the comfort of the individual to obtain the radiographic image.
  • the x-ray tube (19) should be positioned so that its beam forms a 10 degree angle to the floor and coincides with the knee joint line (20).
  • the radiographic image resulting from this proper positioning through the use of the radiographic positioner allows an optimal visualization of the tibiofemoral joint space, in which there is overlap of the anterior and posterior margins of the medial tibial plateaus (23) (Peterfy C, Li J, Zaim S, Duryea J, Lynch JA, Miaux Y, Comparison of fixed-flexion positioning with fluoroscopic semi-flexed positioning for quantifying radiographic jointspace width in the knee: test-retest reproducibility Skeletal Radiol 2003; 3: 128-32. be observed in figure 10.
  • Stainless steel markers embedded in the Radiolfixer's body allow the naked eye to assess the proper angle of the x-ray beam (10 degrees to the ground) from the radiographic image. This is made possible by the shape and arrangement of the markers, which, in the presence of a correct angle, form a radiographic image in which there is the best coincidence between the two types of markers near the knee joint line.
  • the radiographic image obtained from the use of "RADIOLFIXER” illustrates the formation of the best coincidence between the markers (24) below and far from the articular interline (20), which occurs when the beam x is forming an angle of 8 degrees to the ground.
  • Figure 13 shows a radiographic image from the use of "RADIOLFIXER” where the best coincidence between markers (25) and (26) is below and far from the articular interline (20), which occurs when the X-ray beam is forming an angle of 9 degrees to the ground.
  • the radiographic image must reliably represent the object to be examined / researched. Because x-rays differ, the object should be positioned as close as possible to the film, located inside the chassis. However, due to anatomical or positioning issues of the individual, in some situations it is not possible for the object to be examined / researched to be positioned too close to the film. In these cases, the radiographic image magnification occurs, whose rate is proportional to the distance between the object and the film.
  • Figure 15 shows magnification, the object being studied (31) close to the film and away from the focus of x-ray emission (32) results in a more reliable radiographic image (33). Another positioning of the object to be studied (34) away from the film and close to the x-ray emission focus (35) results in a magnified radiographic image (36).
  • the positioning of the stainless steel balls (1 1) present in the RADIOLFIXER allows the magnification rate of the knee structures visualized in the image to be calculated.
  • the balls are positioned at such a distance from the film that the examiner can accurately magnify from the center of the tibiofemoral joint space. This calculation is very important, especially in the scientific environment, because the objective measurement, in millimeters, of the tibiofemoral joint space is the outcome variable most used in longitudinal studies on the progression of knee osteoarthritis (Emrani PS et al. Joint space narrowing). and Kellgren-Lawrence progression in knee osteoarthritis: an analytical literature synthesis Osteoarthritis Cartilage 2008; 16 (8): 873-82).
  • the magnification rate will be the ratio between the actual diameter of the stainless steel sphere, which is 4 mm, and the diameter of the sphere present in the radiographic image, located closest to the tibiofemoral joint space.

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Abstract

The present invention patent relates to a positioner for the acquisition and quality control of radiographic images of knees in the fixed flexion position. The design of the device allows adjusting its height quickly and easily, for convenient use with adults of any height, without requiring any kind of accessory. The positioner is provided with special markers embedded in the body of the equipment, these markers allowing the suitability of the angle of incidence of an X-ray beam to be evaluated with the unaided eye, by any operator, without requiring the use of software or similar technologies.

Description

"POSICIONADOR PARA AQUISIÇÃO E CONTROLE DE QUALIDADE DE IMAGEM RADIOGRÁFICA DE JOELHOS EM FLEXÃO FIXA"  "POSITIONER FOR ACQUISITION AND QUALITY CONTROL OF RADIOGRAPHIC IMAGE OF FIXED KNEE"
[01 ] O presente pedido de patente de invenção compreende um posicionador para aquisição e controle de qualidade de imagem radiográfica de joelhos em flexão fixa. O desenho do dispositivo permite a adequação da altura do mesmo de maneira rápida e fácil, para que seja usado com conforto em indivíduos adultos de qualquer estatura, sem a necessidade de qualquer tipo de acessório. O posicionador é dotado de marcadores especiais incrustados no corpo do equipamento que permitem a avaliação da adequação do ângulo de incidência do feixe de raios-x a olho nu, por qualquer operador, sem a necessidade da utilização de softwares ou tecnologias similares. [01] The present patent application comprises a positioner for acquisition and quality control of radiographic image of knees in fixed flexion. The device's design allows it to be adjusted quickly and easily so that it can be worn comfortably on adults of any size without the need for any accessories. The positioner is equipped with special markers embedded in the body of the equipment that allow the operator to assess the adequacy of the angle of incidence of the x-ray beam by any operator without the need for similar software or technologies.
[02] Exames radiográficos dos joelhos são frequentemente utilizados para auxiliar no diagnóstico de diversas doenças do sistema musculoesquelético, já que evidenciam sinais articulares decorrentes da falta de integridade da cartilagem articular e modificações no osso subjacente e nas margens articulares. Existem diversos protocolos para a aquisição da imagem radiográfica dos joelhos, e, em todos estes protocolos, o posicionamento adequado do indivíduo a ser radiografado e a adequação do ângulo do feixe de raios-x são cruciais para que seja obtida uma imagem de boa qualidade e para que não seja necessária a repetição do exame (Osteoarthritis Initiative - OAI. Radiographic procedure manual for examinations of the hands & feet. Disponível em http://oai.epi-ucsf.org.). [02] Radiographic examinations of the knees are often used to assist in the diagnosis of various diseases of the musculoskeletal system, as they show joint signs due to lack of integrity of the articular cartilage and changes in the underlying bone and joint margins. There are several protocols for the acquisition of radiographic images of the knees, and in all these protocols, the proper positioning of the individual to be radiographed and the adequacy of the x-ray beam angle are crucial for obtaining a good quality image. so that the exam does not need to be repeated (Osteoarthritis Initiative - OAI. Radiographic procedure manual for examinations of the hands & feet. Available at http://oai.epi-ucsf.org.).
[03] Entre os protocolos que não requerem procedimentos invasivos, como, por exemplo, a injeção de contraste nos joelhos, o protocolo de flexão fixa é superior aos demais (Niinimaki et al. The standing fixed flexion view detects narrowing of the joint space better than the standing extended view in patients with moderate osteoarthritis of the knee). Há um único equipamento, desenvolvido pela Synarc, Inc (Newark, CA), que auxilia no posicionamento durante o exame radiográfico de joelhos e que permite a análise do ângulo do feixe de raios-x (Synarc. SynaFlexer™ X-ray Positioning Frame and Phantom. Disponível em http://www.ccbr- synarc.com/services/osteoarthritis/radiography.html. Acesso em 08 de Março de 2013.). Este equipamento foi desenvolvido para utilização em pesquisas clínicas da indústria farmacêutica. Segundo os registros do United States Patent and Trademark Office - USPTO, este equipamento possui a marca registrada SynaflexerTM (número de registro 3213204), e não possui patente própria registrada. O SynaflexerTM é um equipamento que permite o posicionamento confortável dos joelhos para radiografias apenas em indivíduos com média e alta estatura, e que permite a avaliação do ângulo do feixe de raios-x apenas a partir de software com marca registrada SynaVuTM, de uso restrito da Synarc, Inc, não podendo ser comercializado (a utilização de tal tecnologia apenas é permitida através de contrato de serviço entre as partes interessadas e o envio das imagens radiográficas a serem analisadas diretamente para a Synarc, Inc) (McCarrie R & Miller CG. X-Ray acquisition challenges in clinicai trials: Challenges and solutions posed by the Synaflexer™. OARSI 2012 Poster Presentation, 12-14 de Julho de 2012, Carolina do Sul, EUA.) . [03] Among protocols that do not require invasive procedures such as knee contrast injection, the fixed flexion protocol is superior to the others (Niinimaki et al. The standing fixed flexion view detects narrowing the joint space better than the standing extended view in patients with moderate osteoarthritis of the knee). There is a unique device, developed by Synarc, Inc (Newark, CA), which assists in positioning during the radiographic knee examination and allows for analysis of the x-ray beam angle (Synarc. SynaFlexer ™ X-ray Positioning Frame and Phantom Available at http: //www.ccbr-synarc.com/services/osteoarthritis/radiography.html Accessed March 08, 2013.). This equipment has been developed for use in clinical research in the pharmaceutical industry. According to the United States Patent and Trademark Office (USPTO) registrations, this equipment is trademarked with the SynaflexerTM (registration number 3213204), and is not a registered patent. SynaflexerTM is a device that allows comfortable knee positioning for x-rays only in individuals with medium and high stature, and allows the evaluation of x-ray beam angle only from SynaVuTM trademark software, restricted use of Synarc, Inc and may not be marketed (use of such technology is only permitted through a service agreement between interested parties and the submission of radiographic images to be analyzed directly to Synarc, Inc) (McCarrie R & Miller CG. X -Ray acquisition challenges in clinical trials: Challenges and solutions posed by the Synaflexer ™ OARSI 2012 Poster Presentation, July 12-14, 2012, South Carolina, USA.).
[04] Devido às limitações descritas acima, o uso do SynaflexerTM não é possível na rotina de clínicas de Radiologia, nem em pesquisas com financiamento limitado. Portanto, não existe atualmente no mercado mundial um único equipamento que possa ser largamente utilizado no meio científico e na população em geral tanto para o posicionamento adequado dos joelhos a serem radiografados, quanto para avaliar a adequação do ângulo do feixe de raios-x.  [04] Due to the limitations described above, the use of SynaflexerTM is not possible in routine radiology clinics or limited funding research. Therefore, there is currently no single equipment on the world market that can be widely used in the scientific community and in the general population for the proper positioning of the knees to be radiographed, as well as to evaluate the adequacy of the x-ray beam angle.
[05] A invenção proposta consiste em um equipamento que soluciona as limitações do SynaflexerTM, pois seu desenho inovador permite a adequação da altura do posicionador que pode ser usado de maneira confortável em indivíduos de qualquer estatura, mais precisamente aqueles com medida de entre-pernas (distância entre virilha e chão) acima de 50 cm, sem a necessidade de qualquer tipo de acessório.  [05] The proposed invention is a device that solves the limitations of SynaflexerTM, as its innovative design allows the positioner height to be adjusted comfortably for individuals of any height, particularly those with crotch measurements. (groin-to-floor distance) over 50 cm without the need for any accessories.
[06] Na tecnologia apresentada, o tipo e a distribuição de marcadores especiais incrustados no corpo do equipamento permitem a avaliação da adequação do ângulo do feixe de raios-x a olho nu durante o exame, por qualquer leitor, sem a necessidade da utilização de softwares ou tecnologias similares. Um dos tipos de marcadores presentes no equipamento (esfera de aço) também permite ao examinador calcular facilmente a taxa de magnificação das estruturas articulares observadas na imagem radiográfica, oferecendo uma avaliação mais realística da medida dos espaços intra- articulares. [06] In the present technology, the type and distribution of special markers embedded in the body of the equipment allow the readiness of the x-ray beam angle to be assessed during the examination by any reader without the use of software or technologies similar. One of the types of markers present in the equipment (steel ball) also allows the examiner to easily calculate the magnification rate of the joint structures observed in the radiographic image, offering a more realistic assessment of the measurement of intra-articular spaces.
BREVE DESCRIÇÃO DAS FIGURAS BRIEF DESCRIPTION OF THE FIGURES
[07] FIGURA 1 - A Figura 1 exibe a peça intitulada "peça em L" em vista frontal e suas partes constituintes. [07] FIGURE 1 - Figure 1 shows the part entitled "L-piece" in front view and its constituent parts.
[08] FIGURA 2 - A Figura 2 exibe a "peça em L" em vista lateral e suas partes constituintes.  [08] FIGURE 2 - Figure 2 shows the "L-piece" in side view and its constituent parts.
[09] FIGURA 3 - A Figura 3 exibe a "peça em L" em vista superior e suas partes constituintes.  [09] FIGURE 3 - Figure 3 shows the "L-piece" in top view and its constituent parts.
[010] FIGURA 4 - A Figura 4 exibe a peça intitulada "peça retangular" em vista lateral e suas partes constituintes.  [010] FIGURE 4 - Figure 4 shows the part entitled "rectangular part" in side view and its constituent parts.
[01 1 ] FIGURA 5 - A Figura 5 exibe as duas peças idênticas intituladas "peças cilíndricas" em vista frontal.  [01 1] FIGURE 5 - Figure 5 shows the two identical parts entitled "cylindrical parts" in front view.
[012] FIGURA 6 - A Figura 6 exibe as duas peças idênticas intituladas "peças cilíndricas" em vista lateral.  [012] FIGURE 6 - Figure 6 shows the two identical parts entitled "cylindrical parts" in side view.
[013] FIGURA 7 - A Figura 7 ilustra o encaixe entre as peças (peça em L, peça retangular e peças cilíndricas) em vista frontal.  [013] FIGURE 7 - Figure 7 illustrates the fit between the parts (L-piece, rectangular part and cylindrical parts) in front view.
[014] FIGURA 8 - A Figura 8 ilustra o encaixe entre as peças (peça em L, peça retangular e peças cilíndricas) em vista lateral.  [014] FIGURE 8 - Figure 8 illustrates the fit between the parts (L-piece, rectangular part and cylindrical parts) in side view.
[015] FIGURA 9 - A Figura 9 ilustra a vista lateral do conjunto: posicionador radiográfico, membro posicionado, chassi radiográfico e o tubo de raios-x.  [015] FIGURE 9 - Figure 9 illustrates the side view of the assembly: radiographic positioner, positioned limb, radiographic chassis, and x-ray tube.
[016] FIGURA 10 - A Figura 10 ilustra a imagem proveniente do uso do Posicionador Radiográfico (RADIOLFIXER) em que há visualização ótima do espaço articular tíbio-femoral pela sobreposição das margens anterior e posterior dos platôs tibiais mediais [017] FIGURA 11 - A Figura 1 1 exibe uma imagem radiográfica proveniente do uso do "RADIOLFIXER" em que a melhor coincidência entre os marcadores ocorre mais próxima à interlinha articular (linha tracejada), o que ocorre quando o feixe de raios-x forma um ângulo de 10 graus em relação ao solo, produzindo uma imagem radiográfica ideal. [016] FIGURE 10 - Figure 10 illustrates the image from the use of the Radiographic Positioner (RADIOLFIXER) in which there is optimal visualization of the tibiofemoral joint space by overlapping the anterior and posterior margins of the medial tibial plateaus. [017] FIGURE 11 - Figure 11 shows a radiographic image from the use of "RADIOLFIXER" where the best coincidence between markers occurs closest to the articular interline (dashed line), which occurs when the x-ray beam forms an angle of 10 degrees to the ground, producing an ideal radiographic image.
[018] FIGURA 12 - A Figura 12 exibe uma imagem radiográfica proveniente do uso do "RADIOLFIXER" em que a melhor coincidência entre os marcadores ocorre abaixo e distante da interlinha articular (linha tracejada), o que ocorre quando o feixe de raios-x forma um ângulo de 8 graus em relação ao solo. [018] FIGURE 12 - Figure 12 shows a radiographic image from the use of "RADIOLFIXER" where the best coincidence between markers occurs below and far from the articular interline (dashed line), which occurs when the x-ray beam forms an angle of 8 degrees to the ground.
[019] FIGURA 13 - A Figura 13 exibe uma imagem radiográfica proveniente do uso do "RADIOLFIXER" em que a melhor coincidência entre os marcadores ocorre abaixo e distante da interlinha articular (linha tracejada), o que ocorre quando o feixe de raios-x forma um ângulo de 9 graus em relação ao solo. [019] FIGURE 13 - Figure 13 shows a radiographic image from the use of "RADIOLFIXER" where the best coincidence between markers occurs below and far from the articular interline (dashed line), which occurs when the x-ray beam forms an angle of 9 degrees to the ground.
[020] FIGURA 14 - A Figura 14 mostra o triângulo retângulo formado a partir das distâncias entre os marcadores e o ângulo formado entre o feixe de raios-x e o solo, bem como o cálculo para obtenção da distância entre os marcadores. [020] FIGURE 14 - Figure 14 shows the right triangle formed from the distances between the markers and the angle formed between the x-ray beam and the ground, as well as the calculation for obtaining the distance between the markers.
FIGURA 15 - A Figura 1 5 ilustra o fenómeno de magnificação de acordo com a posição do objeto a ser estudado no exame radiográfico.  FIGURE 15 - Figure 15 illustrates the phenomenon of magnification according to the position of the object to be studied on radiographic examination.
DESCRIÇÃO DETALHADA DA TECNOLOGIA DETAILED DESCRIPTION OF TECHNOLOGY
[021 ] O presente pedido de patente de invenção compreende um posicionador para aquisição e controle de qualidade de imagem radiográfica de joelhos em flexão fixa. O desenho do dispositivo permite a adequação da altura do mesmo de maneira rápida e fácil, para que seja usado com conforto em indivíduos de qualquer estatura, sem a necessidade de qualquer tipo de acessório. O posicionador é dotado de marcadores especiais incrustados no corpo do equipamento que permitem a avaliação da adequação do ângulo de incidência do feixe de raios-x a olho nu, por qualquer operador, sem a necessidade da utilização de softwares ou tecnologias similares. [022] O dispositivo (RADIOLFIXER) é constituído por um conjunto de peças de acrílico, transparentes e moldadas conforme um desenho exclusivo, a espessura dessas peças deve estar entre 0,8 a 2 cm. [021] The present patent application comprises a positioner for acquisition and quality control of radiographic image of knees in fixed flexion. The device's design allows it to be adjusted quickly and easily so that it can be worn comfortably on individuals of any size without the need for any accessories. The positioner is equipped with special markers embedded in the body of the equipment that allow the operator to assess the adequacy of the angle of incidence of the x-ray beam by any operator without the need for similar software or technologies. [022] The device (RADIOLFIXER) consists of a set of transparent and molded acrylic pieces according to an exclusive design, the thickness of these pieces should be between 0.8 to 2 cm.
[023] Na figura 1 tem-se a peça em "L" (1 ) sem emendas, o quadrado (2) que compõe a base possui dimensões 40 cm de largura e 40 cm de comprimento, o retângulo (3) que forma a parte restante da peça em "L", onde as guias fixas (4) estão aderidas, possui 40 cm de largura e 75 cm de comprimento. Na peça em "L" estão duas guias fixas (4) coladas a 0,8 cm do eixo de simetria (5) vertical do retângulo (3) a partir da base quadrada, o espaço entre as guias é de 1 ,6 cm, essas guias são idênticas e possuem dois furos (6) cada uma para encaixe das peças cilíndricas (7), os dois furos (6) estão posicionados em cada guia a 35 cm e 45 cm, respectivamente, distantes da borda inferior da mesma e sobre o eixo de simetria da guia (8), o diâmetro desses furos é de 1 cm. A peça em "L" possui também uma peça em formato "V" (9) dotada de um ângulo de 10 graus colada às porções horizontal e vertical da peça em "L" (1 ), a altura da peça em "V" medida a partir da base quadrada da peça em "L" (1 ) é 19 cm, a distância do ponto que corresponde ao vértice do ângulo de 10° à extremidade da peça em "V" mede 27 cm.  [023] In Figure 1 there is the seamless "L" piece (1), the square (2) that makes up the base has dimensions 40 cm wide and 40 cm long, the rectangle (3) forming the The remaining part of the "L" piece, where the fixed guides (4) are attached, is 40 cm wide and 75 cm long. In the "L" piece are two fixed guides (4) glued 0.8 cm from the vertical symmetry axis (5) of the rectangle (3) from the square base, the space between the guides is 1.6 cm, These guides are identical and have two holes (6) each to engage the cylindrical parts (7), the two holes (6) are positioned on each guide 35 cm and 45 cm, respectively, far from the lower edge of the same and over the axis of symmetry of the guide (8), the diameter of these holes is 1 cm. The "L" part also has a "V" shaped part (9) with a 10 degree angle glued to the horizontal and vertical portions of the "L" part (1), the height of the measured "V" part from the square base of the "L" piece (1) is 19 cm, the distance from the point corresponding to the vertex of the 10 ° angle to the end of the "V" piece measures 27 cm.
[024] A peça retangular (10) do posicionador radiográfico é mostrada na figura 4, essa peça é composta de 32 marcadores de aço inox incrustados, sendo 16 marcadores esféricos na parte anterior (1 1 ) que possuem diâmetro igual a 4 mm, metade de seu volume está imerso no acrílico, esses marcadores esféricos estão posicionados sobre a borda anterior (1 1 ) da peça retangular (10), o primeiro e último marcadores esféricos estão posicionados a 10 cm e 40 cm, respectivamente, da base inferior da peça retangular (10), com espaçamento entre esferas de 2,0 cm. Há ainda 16 marcadores em formato cilíndrico, horizontalmente posicionados ao longo do corpo da peça retangular, em sua parte posterior (13). Esses marcadores cilíndricos possuem 2 mm de espessura e 1 ,4 cm de comprimento, metade do volume dos marcadores cilíndricos está incrustado na peça retangular. O primeiro e último marcadores cilíndricos estão posicionados a 9,0 cm e 39,0 cm, respectivamente, da borda inferior da peça retangular (10), com espaçamento entre marcadores de 2,0 cm. A peça retangular possui ainda 9 furos (14) ao longo de seu comprimento,dispostos sobre o eixo de simetria vertical (12) com diâmetro de 1 cm, o primeiro e o último furos estão posicionados a 4 cm e 40 cm, respectivamente, da borda inferior da peça retangular, o espaçamento entre os furos é de 5,0 cm. [024] The rectangular part (10) of the radiographic positioner is shown in figure 4, this part is composed of 32 stainless steel markers inlaid, 16 spherical markers in the front part (1 1) having a diameter equal to 4 mm, half their volume is immersed in the acrylic, these spherical markers are positioned over the anterior edge (11) of the rectangular part (10), the first and last spherical markers are positioned at 10 cm and 40 cm, respectively, from the lower base of the part. rectangular (10) with a ball spacing of 2.0 cm. There are also 16 cylindrical markers, horizontally positioned along the body of the rectangular piece at its back (13). These cylindrical markers are 2 mm thick and 1.4 cm long, half the volume of the cylindrical markers is embedded in the rectangular piece. The first and last cylindrical markers are positioned at 9.0 cm and 39.0 cm, respectively, from the bottom edge of the rectangular part (10), with a spacing of 2.0 markers. cm. The rectangular piece still has 9 holes (14) along its length, arranged on the vertical symmetry axis (12) with a diameter of 1 cm, the first and last holes are positioned at 4 cm and 40 cm, respectively, from the bottom edge of the rectangular part, the spacing between the holes is 5.0 cm.
[025] O dispositivo possui ainda duas peças cilíndricas compactas (7), idênticas, cujo diâmetro do círculo presente na seção transversal longitudinal é 1 cm e o comprimento da peça é de 5,5 cm, conforme ilustra a figura 5.  [025] The device also has two identical compact cylindrical parts (7), whose circle diameter in the longitudinal cross section is 1 cm and the length of the part is 5.5 cm, as shown in Figure 5.
[026] A peça retangular (10) se une à peça em "L" por meio das peças cilíndricas (7) que se encaixam simultaneamente nos furos (6) contidos nas guias fixas e, também, em dois, dos nove furos que compõe a peça retangular (14), ou seja, a peça retangular fica suspensa através da fixação da mesma nas guias fixas contidas na peça em "L", o travamento ocorre através das peças cilíndricas compactas (7) que atravessam os furos de ambas as peças (6) e (14), essa montagem das peças caracteriza o posicionador radiográfico "RADIOLFIXER", as vistas frontal e lateral do posicionador radiográfico estão dispostas, respectivamente, nas figuras 7 e 8. [026] The rectangular part (10) is joined to the "L" part by means of the cylindrical parts (7) which simultaneously fit into the holes (6) contained in the fixed guides and also in two of the nine holes that compose it. the rectangular part (14), ie the rectangular part is suspended by fixing it to the fixed guides contained in the "L" part, the locking occurs through the compact cylindrical parts (7) that pass through the holes of both parts. (6) and (14), this assembly of the parts characterizes the radiographic positioner "RADIOLFIXER", the front and side views of the radiographic positioner are arranged, respectively, in figures 7 and 8.
[027] Para efetuar a radiografia, o dispositivo "RADIOLFIXER" é posicionado em frente ao chassi contendo o filme radiográfico (15) de modo que não haja nenhum espaço entre ele. A peça retangular (10) deve estar fixa à peça em "L" através das peças cilíndricas compactas (7) em uma posição compatível com a medida da distância entre-pernas (distância entre virilha e chão) do indivíduo a ser radiografado, pois a peça retangular (10) pode mover-se verticalmente através das guias fixas (4) coladas na peça em "L" (1 ) de modo que a posição em que a mesma ficará suspensa poderá ser convenientemente escolhida de acordo com a medida entre-pernas do indivíduo, propiciando uma posição adequada do membro e o conforto do indivíduo para que a imagem radiográfica seja obtida. Para fixar a peça retangular (10), basta atravessar as peças cilíndricas compactas pelos orifícios contidos nas guias fixas (4) e na peça retangular (10), que devem estar alinhadas. O indivíduo a ser radiografado deve permanecer em pé sobre o "RADIOLFIXER", com a borda interna dos pés (16), joelhos (17) e coxas (18) firmemente apoiados contra o "RADIOLFIXER", esse posicionamento está demonstrado na figura 9. A distância entre o chassi (15) e o tubo de raios- x (19) deve ser de 1 ,83 m (Osteoarthritis Initiative - OAI. Radiographic procedure manual for examinations of the hands & feet. Disponível em http://oai.epi-ucsf.org.). [027] For radiography, the "RADIOLFIXER" device is positioned in front of the chassis containing the radiographic film (15) so that there is no space between it. The rectangular piece (10) must be fixed to the "L" piece through the compact cylindrical pieces (7) in a position compatible with the measurement of the leg-to-leg (groin-to-floor distance) of the individual to be radiographed, as the Rectangular piece (10) can move vertically through the fixed guides (4) glued to the "L" piece (1) so that the position in which it will be suspended can be conveniently chosen according to the between-leg measurement. providing an adequate position of the limb and the comfort of the individual to obtain the radiographic image. To fix the rectangular part (10), simply traverse the compact cylindrical parts through the holes in the fixed guides (4) and the rectangular part (10), which must be aligned. The subject to be radiographed should stand on the RADIOLFIXER, with the inner edge of the feet (16), knees (17) and thighs (18) firmly against the RADIOLFIXER, This positioning is shown in Figure 9. The distance between the chassis (15) and the x-ray tube (19) should be 1.83 m (Osteoarthritis Initiative - OAI.) Radiographic procedure manual for examinations of the hands & feet. Available at http://oai.epi-ucsf.org.).
[028] O tubo de raios-x (1 9) deve ser posicionado de forma que seu feixe forme um ângulo de 10 graus com o chão e coincida com a interlinha articular dos joelhos (20). A imagem radiográfica decorrente desse posicionamento adequado através do uso do posicionador radiográfico permite uma visualização ótima do espaço articular tíbio-femoral, em que há sobreposição das margens anterior e posterior dos platôs tibiais mediais (23) (Peterfy C, Li J, Zaim S, Duryea J, Lynch JA, Miaux Y, et al. Comparison of fixed-flexion positioning with fluoroscopic semi-flexed positioning for quantifying radiographic jointspace width in the knee: test-retest reproducibility. Skeletal Radiol 2003;3:128-32.) pode ser observada na figura 10.  [028] The x-ray tube (19) should be positioned so that its beam forms a 10 degree angle to the floor and coincides with the knee joint line (20). The radiographic image resulting from this proper positioning through the use of the radiographic positioner allows an optimal visualization of the tibiofemoral joint space, in which there is overlap of the anterior and posterior margins of the medial tibial plateaus (23) (Peterfy C, Li J, Zaim S, Duryea J, Lynch JA, Miaux Y, Comparison of fixed-flexion positioning with fluoroscopic semi-flexed positioning for quantifying radiographic jointspace width in the knee: test-retest reproducibility Skeletal Radiol 2003; 3: 128-32. be observed in figure 10.
[029] Os marcadores em aço inox incrustados no corpo do Radiolfixer permitem a avaliação, a olho nu, da angulação adequada do feixe de raios-x (10 graus em relação ao chão) a partir da imagem radiográfica. Isto se torna possível pelo formato e disposição dos marcadores, que, na presença de uma angulação correta, formam uma imagem radiográfica em que há a melhor coincidência entre os dois tipos de marcadores próximos à interlinha articular dos joelhos.  [029] Stainless steel markers embedded in the Radiolfixer's body allow the naked eye to assess the proper angle of the x-ray beam (10 degrees to the ground) from the radiographic image. This is made possible by the shape and arrangement of the markers, which, in the presence of a correct angle, form a radiographic image in which there is the best coincidence between the two types of markers near the knee joint line.
[030] Na figura 1 1 tem-se uma imagem radiográfica proveniente do uso do "RADIOLFIXER" em que a melhor coincidência entre os marcadores (21 ) e (22) ocorre mais próxima à interlinha articular, representada através da linha horizontal tracejada (20), o que ocorre quando o feixe de raios-x esta formando um ângulo de 10 graus em relação ao solo, produzindo uma imagem radiográfica ideal.  [030] In Figure 11 there is a radiographic image from the use of the "RADIOLFIXER" where the best coincidence between the markers (21) and (22) occurs closest to the articular interline, represented by the dashed horizontal line (20). ), which occurs when the x-ray beam is forming a 10 degree angle to the ground, producing an ideal radiographic image.
[031 ] Na Figura 12, a imagem radiográfica obtida a partir do uso do "RADIOLFIXER" ilustra a formação da melhor coincidência entre os marcadores (24) abaixo e distante da interlinha articular (20), o que ocorre quando o feixe de raios-x esta formando um ângulo de 8 graus em relação ao solo. [032] A Figura 13, exibe uma imagem radiográfica proveniente do uso do "RADIOLFIXER" em que a melhor coincidência entre os marcadores (25) e (26) se dá abaixo e distante da interlinha articular (20), o que ocorre quando o feixe de raios-x esta formando um ângulo de 9 graus em relação ao solo. [031] In Figure 12, the radiographic image obtained from the use of "RADIOLFIXER" illustrates the formation of the best coincidence between the markers (24) below and far from the articular interline (20), which occurs when the beam x is forming an angle of 8 degrees to the ground. [032] Figure 13 shows a radiographic image from the use of "RADIOLFIXER" where the best coincidence between markers (25) and (26) is below and far from the articular interline (20), which occurs when the X-ray beam is forming an angle of 9 degrees to the ground.
[033] A disposição dos marcadores na peça retangular (10) em acrílico deve ser calculada para que, na presença de uma angulação correta, haja a melhor coincidência entre os dois tipos de marcadores, em proximidade à interlinha articular dos joelhos. Para tal, deve-se utilizar a função trigonométrica Tangente. Na figura 14 tem-se: o ângulo de 10 graus formado entre o feixe de raios-x e o solo (27), que é o argumento da função tangente; a hipotenusa (28); o cateto oposto (29), que representa a distância entre marcadores de diferentes tipos ou metade da distância entre marcadores do mesmo tipo; o cateto adjacente (29), que representa a largura da peça retangular, cuja dimensão é 60 mm. Efetuando-se os cálculos, encontra-se o valor do cateto oposto, que é 10,58 mm. [033] The arrangement of the markers on the rectangular piece (10) in acrylic should be calculated so that, in the presence of a correct angle, there is the best coincidence between the two types of markers, in proximity to the articular interline of the knees. For this, the trigonometric function Tangent must be used. In Figure 14 we have: the 10 degree angle formed between the x-ray beam and the ground (27), which is the argument of the tangent function; hypotenuse (28); the opposite collet (29), which represents the distance between markers of different types or half the distance between markers of the same type; the adjacent collet (29), which represents the width of the rectangular piece, whose dimension is 60 mm. Performing the calculations gives the value of the opposite collet, which is 10.58 mm.
[034] A imagem radiográfica deve representar fidedignamente o objeto a ser examinado/pesquisado. Como os raios x são divergentes, o objeto deve estar posicionado o mais próximo possível do filme, localizado no interior do chassi. Entretanto, devido a questões anatómicas ou de posicionamento do indivíduo, em algumas situações não é possível que o objeto a ser examinado/pesquisado seja posicionado muito próximo do filme. Nestes casos, ocorre a magnificação da imagem radiográfica, cuja taxa é proporcional à distância entre o objeto e o filme.  [034] The radiographic image must reliably represent the object to be examined / researched. Because x-rays differ, the object should be positioned as close as possible to the film, located inside the chassis. However, due to anatomical or positioning issues of the individual, in some situations it is not possible for the object to be examined / researched to be positioned too close to the film. In these cases, the radiographic image magnification occurs, whose rate is proportional to the distance between the object and the film.
[035] Na figura 15 está ilustrada a magnificação, o objeto a ser estudado (31 ) próximo ao filme e distante do foco de emissão de raios-x (32), resulta em imagem radiográfica mais fidedigna (33). Outro posicionamento do objeto a ser estudado (34) distante do filme e próximo do foco de emissão de raios-x (35) resulta em uma imagem radiográfica magnificada (36).  [035] Figure 15 shows magnification, the object being studied (31) close to the film and away from the focus of x-ray emission (32) results in a more reliable radiographic image (33). Another positioning of the object to be studied (34) away from the film and close to the x-ray emission focus (35) results in a magnified radiographic image (36).
[036] O posicionamento das esferas de aço inox (1 1 ) presentes no RADIOLFIXER permite que seja calculada a taxa de magnificação das estruturas do joelho visualizadas na imagem. As esferas estão posicionadas a uma distância tal do filme que permite ao examinador precisar a magnificação do centro do espaço articular tíbio-femoral. Este cálculo é muito importante, principalmente no ambiente científico, pois a medida objetiva, em milímetros, do espaço articular tíbio-femoral é a variável desfecho mais utilizada em estudos longitudinais sobre a progressão da osteoartrite de joelhos (Emrani PS et al. Joint space narrowing and Kellgren-Lawrence progression in knee osteoarthritis: an analytic literature synthesis. Osteoarthritis Cartilage 2008;16(8):873-82). A taxa de magnificação será a razão entre o diâmetro real da esfera de aço inox, que é de 4 mm, e o diâmetro da esfera presente na imagem radiográfica, localizada mais próxima ao espaço articular tíbio-femoral. [036] The positioning of the stainless steel balls (1 1) present in the RADIOLFIXER allows the magnification rate of the knee structures visualized in the image to be calculated. The balls are positioned at such a distance from the film that the examiner can accurately magnify from the center of the tibiofemoral joint space. This calculation is very important, especially in the scientific environment, because the objective measurement, in millimeters, of the tibiofemoral joint space is the outcome variable most used in longitudinal studies on the progression of knee osteoarthritis (Emrani PS et al. Joint space narrowing). and Kellgren-Lawrence progression in knee osteoarthritis: an analytical literature synthesis Osteoarthritis Cartilage 2008; 16 (8): 873-82). The magnification rate will be the ratio between the actual diameter of the stainless steel sphere, which is 4 mm, and the diameter of the sphere present in the radiographic image, located closest to the tibiofemoral joint space.

Claims

REIVINDICAÇÕES
1. Posicionador para aquisição e controle de qualidade de imagem radiográfica de joelhos em flexão fixa (RADIOLFIXER), caracterizado por conter um conjunto de peças de acrílico com medida de espessura entre 0,8 a 2 cm, transparentes e moldadas; sendo uma peça em "L" (1 ) sem emendas, uma peça em formato "V" (9) dotada de um ângulo de 10 graus, uma peça retangular (10) contendo 32 marcadores de aço inox incrustados e duas peças cilíndricas compactas (7) idênticas. 1. Positioner for acquisition and quality control of radiographic image of fixed flexion knees (RADIOLFIXER), characterized by containing a set of transparent and molded 0.8 to 2 cm thick acrylic pieces; being a seamless "L" part (1), a "V" shaped part (9) with a 10-degree angle, a rectangular part (10) containing 32 inlaid stainless steel markers and two compact cylindrical parts ( 7) identical.
2. Posicionador para aquisição e controle de qualidade de imagem radiográfica de joelhos em flexão fixa (RADIOLFIXER), de acordo com a reivindicação 1 , caracterizado por conter uma peça em "L" (1 ) sem emendas, o quadrado (2) que compõe a base da peça em "U possui dimensões 40 cm de largura e 40 cm de comprimento, o retângulo (3) que forma a parte restante da peça em "L" possui 40 cm de largura e 75 cm de comprimento, a peça em "L" possui duas guias fixas (4) coladas a 0,8 cm do eixo de simetria (5) vertical do retângulo (3) a partir da base quadrada, o espaço entre as guias é de 1 ,6 cm, as guias (4) são idênticas e possuem dois furos (6) cada uma, os dois furos (6) estão posicionados em cada guia a 35 cm e 45 cm, respectivamente, distantes da borda inferior da mesma e sobre o eixo de simetria da guia (8), o diâmetro desses furos é de 1 cm, a peça em "L" possui também uma peça em formato "V" (9) dotada de um ângulo de 10 graus colada às porções horizontal e vertical da peça em "L" (1 ), a altura da peça em "V" medida a partir da base quadrada da peça em "L" (1 ) é 19 cm, , a distância do ponto que corresponde ao vértice do ângulo de 10° à extremidade da peça em "V" mede 27 cm.  Fixed flexion knee radiographic image acquisition and quality control positioner (RADIOLFIXER) according to Claim 1, characterized in that it contains a seamless "L" part (1), the square (2) which comprises the base of the "U" piece is 40 cm wide and 40 cm long, the rectangle (3) that forms the remaining part of the "L" piece is 40 cm wide and 75 cm long, the " L "has two fixed guides (4) glued 0.8 cm from the vertical symmetry axis (5) of the rectangle (3) from the square base, the space between the guides is 1.6 cm, the guides (4 ) are identical and have two holes (6) each, the two holes (6) are positioned on each guide at 35 cm and 45 cm, respectively, away from the bottom edge of the guide and about the axis of symmetry of the guide (8) , the diameter of these holes is 1 cm, the "L" part also has a "V" shaped part (9) with a 10 degree angle glued to the horizontal portions. and vertical of the "L" part (1), the height of the "V" part measured from the square base of the "L" part (1) is 19 cm, the distance from the point corresponding to the vertex of the angle from 10 ° to the end of the "V" piece measures 27 cm.
3. Posicionador para aquisição e controle de qualidade de imagem radiográfica de joelhos em flexão fixa (RADIOLFIXER), de acordo com a reivindicação 1 caracterizado por conter uma peça retangular (10) composta de 32 marcadores de aço inox incrustados, dos quais 16 marcadores esféricos na parte anterior (1 1 ) que possuem diâmetro igual a 4 mm, metade de seus volumes estão imersos no acrílico, esses marcadores esféricos estão posicionados sobre o eixo de simetria vertical (12) da peça retangular (10), o primeiro e último marcadores esféricos estão posicionados a 10 cm e 40 cm, respectivamente, da base inferior da peça retangular (10), com espaçamento entre esferas de 2,0 cm, a peça retangular (10) possui também 16 marcadores em formato cilíndrico, horizontalmente posicionados ao longo do corpo da peça retangular, em sua parte posterior (13), esses marcadores cilíndricos possuem 2 mm de espessura e 1 ,4 cm de comprimento, parte do volume dos marcadores cilíndricos está incrustado na peça retangular, o primeiro e último marcadores cilíndricos estão posicionados a 9,0 cm e 39,0 cm, respectivamente, da borda inferior da peça retangular (10), com espaçamento entre marcadores de 2,0 cm, a peça retangular possui ainda 9 furos (14) ao longo de seu comprimento,dispostos sobre o eixo de simetria vertical (12) e com diâmetro de 1 cm, o primeiro e o último furos estão posicionados a 4 cm e 40 cm, respectivamente, distantes da borda inferior da peça retangular, o espaçamento entre os furos é de 5,0 cm. Positioner for the acquisition and quality control of fixed flexion knee radiographic image (RADIOLFIXER) according to claim 1, characterized in that it contains a rectangular part (10) composed of 32 stainless steel markers, of which 16 spherical markers. in the anterior part (11) which have a diameter equal to 4 mm, half of their volumes are immersed in acrylic, these spherical markers are positioned on the vertical symmetry axis (12) of the rectangular part (10), the first and last spherical markers are positioned at 10 cm and 40 cm, respectively, from the bottom base of the rectangular part (10), with 2.0 cm ball spacing, the rectangular part (10) also has 16 cylindrical shaped markers, horizontally positioned along the body of the rectangular part at its rear part (13), these cylindrical markers are 2 mm thick and 1.4 cm long, part of the volume of the cylindrical markers is embedded in the rectangular part, the first and last Cylindrical markers are positioned at 9.0 cm and 39.0 cm, respectively, from the bottom edge of the rectangular part (10), with 2.0 cm spacing between markers, the rectangular part still has 9 holes (14) along their length, arranged on the vertical symmetry axis (12) and with a diameter of 1 cm, the first and last holes are positioned at 4 cm and 40 cm, respectively, distant from the lower edge of the rectangular piece, the spacing the between the holes is 5.0 cm.
4. Posicionador para aquisição e controle de qualidade de imagem radiográfica de joelhos em flexão fixa (RADIOLFIXER), de acordo com a reivindicação 1 caracterizado por conter duas peças cilíndricas compactas (7), idênticas, cujo diâmetro do círculo presente na seção transversal é 1 cm e o comprimento da peça é de 5,5 cm.  Positioner for acquisition and quality control of radiographic image of fixed flexion knees (RADIOLFIXER) according to claim 1, characterized in that it contains two identical compact cylindrical parts (7), whose diameter of the circle in the cross section is 1 cm and the length of the piece is 5.5 cm.
5. Posicionador para aquisição e controle de qualidade de imagem radiográfica de joelhos em flexão fixa (RADIOLFIXER), de acordo com as reivindicações de 1 a 4, caracterizado por poder ser constituído de polímeros, preferencialmente, acrílico.  Positioner for acquisition and quality control of radiographic image of fixed flexion knees (RADIOLFIXER) according to claims 1 to 4, characterized in that it can consist of preferably acrylic polymers.
6. Posicionador para aquisição e controle de qualidade de imagem radiográfica de joelhos em flexão fixa (RADIOLFIXER), de acordo com as reivindicações de 1 a 5 caracterizado por ser utilizado em aquisição de imagens radiográficas de joelhos.  Positioner for acquisition and quality control of radiographic image of knees in fixed flexion (RADIOLFIXER) according to claims 1 to 5, characterized in that it is used for acquisition of radiographic images of knees.
PCT/IB2014/067387 2013-12-27 2014-12-29 Positioner for the acquisition and quality control of radiographic images of knees in the fixed flexion position (radiolfixer) WO2015097683A1 (en)

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BR102013033625-4A BR102013033625B1 (en) 2013-12-27 2013-12-27 Positioner for acquisition and quality control of radiographic image of knees in fixed flexion
BRBR1020130336254 2013-12-27

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4700373A (en) * 1986-05-01 1987-10-13 Miller Edward H Platforms for X-ray examination of knee joints
US20050089147A1 (en) * 2003-10-27 2005-04-28 Cantacessi Vince Sr. Knee x-ray cassette support
EP2543320A1 (en) * 2007-07-10 2013-01-09 T. Derek V. Cooke Radiographic Imaging Apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4700373A (en) * 1986-05-01 1987-10-13 Miller Edward H Platforms for X-ray examination of knee joints
US20050089147A1 (en) * 2003-10-27 2005-04-28 Cantacessi Vince Sr. Knee x-ray cassette support
EP2543320A1 (en) * 2007-07-10 2013-01-09 T. Derek V. Cooke Radiographic Imaging Apparatus

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BR102013033625A2 (en) 2016-03-15

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