KR101786483B1 - Patient dose Management system in dental - Google Patents

Abstract

The present invention relates to a patient dose management system in the field of dentistry, which comprises inspection equipment for in-vivo radiation examination, panoramic radiation examination, dental CT examination, and radiation dose calculation And an effective dose management server in which an effective dose calculation program is installed to calculate an effective dose of the patient using the exposure dose value. According to the patient dose management system, dental radiation workers can easily ascertain a dose and cumulatively manage the individual dose of the patient, thereby contributing to reduction of the radiation dose.

Description

[0002] Patient dose management system in dental field [

The present invention relates to the management of patient dose history in the field of dentistry. More particularly, the present invention relates to the management of patient dose history in a dental field, and more particularly, To a patient dose management system in a dental field.

With the development and development of high-tech imaging devices with great clinical significance around the world, their use is rapidly increasing, and concerns and concerns about radiation exposure are increasing. Especially in the field of dentistry, although the individual radiation dose is smaller than that of radiography in general radiology field, the frequency of radiography is remarkably high and various types of radiation equipment are used regularly. Therefore, systematic management of radiation exposure dose to be. The reason for this is that, even in the case of small and medium hospitals, there is an average of 2 or more radiation devices, and the frequency of screening and screening using these devices is high.

Therefore, various researches are being carried out to reduce the patient dose. For example, in 2009, 'Guidelines for the recommendation of patients' recommended doses of intraoral, panoramic, and dental CT radiological examinations were proposed in 'Study for preparing patient dose recommendation in dental X-ray examination'. In 2013, And to provide guidelines for age-specific patient dose recommendations, including pediatric patients. However, due to the confidentiality of patients and the lack of skills in the field of dentistry, it is not possible to trace / record the patient dose for individual patients.

Nevertheless, dose tracking research in the dental field is a national necessity. That is, as described above, since the number of dental radiological examinations is large in the total medical radiological examinations (for example, exceeding about 10%) because of the high frequency of screening and examination, radiation exposure in dental treatment is concerned.

The management of patient dose is conventionally proposed in various ways. However, existing programs have some important limitations.

For example, the calculation method of patient dose by dental radiography uses a direct radiation dose measurement method using a dose evaluation simulator, a computer simulation calculation method using a radiation transport program, and a dose calculation program. However, in the case of the radiation dose direct measurement method using the dose evaluation simulator, it is possible to perform the radiation dose measurement experiment for the specific shooting condition of the specific imaging equipment, it is virtually impossible to carry out an experiment on a combination of parameters (e.g., mAs, filter, distance, etc.). Also, it takes a lot of time and expense to carry out an actual experiment. In the case where a part of the organs in the body is exposed to the radiation source (for example, when only part of the saliva is included in the examination area during the panoramic photographing, the average dose can not be calculated for the exposing organ).

Another example is a computer simulation calculation using a radiation transport program. The above method is mainly performed using a radiation transport computer program using the Monte Carlo methodology. However, this method requires a lot of computation time as well as expert knowledge of the use code. Therefore, there is a limit to practitioners who directly perform dental radiography without special training, using a professional radiation transport code to calculate patient dose.

Another example is a dental imaging dose calculation program called PCXMC, but this also has a problem that the dose evaluation result is distorted by the dose evaluation simulator.

Korean Patent Laid-Open No. 10-2008-0039920 (2008. 05. 07. A system and method for evaluating the dose administered by a radiation treatment system)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a patient dose management system in a dental field which can easily calculate a patient dose in a dental radiography. In other words, it can be said that it provides a program that can calculate the patient dose in various environments when the radiotherapy examination, panoramic radiography and dental CT examination are performed.

In addition, the present invention enables DB to be constructed by inputting patient dose according to dental radiographing test so that patient dose can be easily known, thereby managing patient dose for dental radiotherapy for each patient and reducing the degree of exposure.

According to an aspect of the present invention for achieving the above object, there is provided an inspection apparatus for an intra-oral radiation examination, a panoramic radiography examination, and a dental CT examination; A dose management integration server for analyzing information transmitted from the inspection equipment and calculating an exposure value; And an effective dose management program in which an effective dose calculation program is installed to calculate an effective dose of a patient using the exposure dose value.

Said inspection equipment comprising: a first device for calculating a dose using DICOM header information; A second-1 equipment for calculating a dose with reference to a DAP value of a pre-provided look-up table among equipment not reporting the exposure value; And second-2 equipment for calculating the dose using the indirect dose calculation method (NDD).

The NDD method is calculated by the following equation.

, Where kVp is tube voltage, mAs is tube current, FSD is source-to-patient distance, A and B are 18.305 and 0.0027 respectively, and F _a is an indirect calculation factor for aluminum filter thickness and tube voltage.

The DICOM header includes a plurality of data elements in a set format, each of the data elements includes a 2-byte group number (Module) and a 2-byte element number (item). A Value Representation (VR) that represents what type of data the element has; VL (Value Length) indicating the size of the element value; And 'Value Field' which is data of actual data elements.

The effective dose management server may further include a factor derivation unit for deriving factors necessary for calculating the effective dose according to the intra-corporeal radiography, panoramic radiography, and dental CT examination, and the factor derivation unit affects the radiation dose And factors necessary for dose assessment of the final patient by test.

The effective dose is calculated by the following formula.

, Where D-Factor is the effective dose conversion factor.

The effective dose calculation program includes a dental radiography examination type selection window, a patient information selection window for selecting an age / sex of a patient, a test type setting window for selecting a detailed examination type of each dental radiography, a tube voltage / A selection window for selecting the effective dose evaluation method of ICRP 60 or ICRP 103, a display window for displaying the calculated long term dose and effective dose, and the like are displayed.

The patient dose management system in the dental field according to the present invention has the following effects.

The present invention provides a patient dose management system for patient dose management in a dental imaging medical test with a high imaging frequency. These patient dose management systems can easily calculate patient doses for each dental imaging examination, as well as establish a database for patient dose assessment and exposure management. In addition, not only can the history of the patient dose be managed by individual patient, but also the patient himself can easily confirm his accumulated dose information. Above all, the change of the effective dose according to various shooting conditions can be confirmed.

Therefore, it is possible to appropriately control the amount of radiation of medical radiation, thereby contributing to public health, and contributing to the awareness of radiation safety culture.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a patient dose management system according to a preferred embodiment of the present invention. FIG.
FIG. 2 is a block diagram showing a DICOM header format structure provided by a radiological examination apparatus according to the present invention; FIG.
FIGS. 3A to 3C are diagrams illustrating an effective dose calculation program according to the dental radiography type of the present invention; FIG.
4 to 9 are diagrams showing examples of a program screen state for obtaining a radiation dose according to the present invention.
10 is a flowchart illustrating an operation of a patient dose management system according to the present invention.

The present invention aims to easily calculate the patient dose for each examination in the dental radiography and to make it easy to confirm the patient dose by DB for each patient so as to ultimately provide a basis for reducing the patient dose at the national level. .
Before describing the present invention, the terms "exposure dose", "irradiation dose", "absorbed dose", "equivalent dose", "effective dose", "patient dose", "exposure dose"Quot; radiation amount "will be described. The definition of these terms is described with reference to the well-known " Criteria for Radiation Protection, etc., Nuclear Safety Commission Notice No. 2014-34 ".
"Exposure dose" is the unit of radiation energy that is exposed to human radiation by ionizing radiation (X-ray, gamma ray, beta ray, alpha ray, etc.), and is divided into irradiated dose, absorbed dose, equivalent dose, and effective dose.
"Irradiation dose" refers to the amount of charge generated per unit mass of air by X-ray or gamma radiation. Coulombs / kg (C / kg) or Röntgen (R) are used as irradiation dose units, and 1R is equal to 2.58 × 10 ^-4 C / kg.
"Absorbed dose" refers to the energy of the absorbed radiation per unit mass of the substance. Gray (Gy) is used as a unit of absorbed dose, and 1 Gy is 1 Joule / kg (J / kg).
"Equivalent dose" refers to the amount of absorbed dose multiplied by the radiation weight of the radiation when the dose is indicated. Sievert (Sv) is used as the unit of equivalent dose, and the radiation weights used at this time are shown in [Table 1].

"Effective dose" refers to the amount by which the equivalent dose of each tissue is multiplied by the tissue weight of that tissue and summed up to all tissues to represent the degree of risk according to the distribution of intra-tissue doses within the body. Sievert is used as a unit of effective dose, and the tissue weights to be used at this time are shown in [Table 2].

"Patient dose" refers to the dose of the radiation specified as the patient. Medical exposures are largely divided into patient exposures and occupational exposures. The unit uses the effective dose (Sievert).
"Exposure dose" has the same meaning as exposure dose.
"Radiation dose" means a unit used in the same sense as the "absorbed dose" described above, and refers to the energy of the radiation absorbed per unit mass of the substance. Gray (Gy) is used as a unit, and 1 Gy is 1 Joule / kg (J / kg).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a patient dose management system according to the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a patient dose management system according to a preferred embodiment of the present invention. FIG.

The patient dose management system 100 is provided with inspection equipment 110 for each dental radiography type. In the dental field, types of radiography can be divided into intraoral radiography, panoramic radiography, and dental CT examination. This is to develop items for inputting patient doses and to develop a program for calculating patient doses by dental radiographs.

Depending on the function, the radiographic equipment is again divided as follows. That is, the intra-site radiation examination equipment, the panoramic radiation examination equipment, and the dental CT examination equipment are classified into a device (hereinafter referred to as a "first device") for reporting an exposure value at the time of radiography according to the device performance / (Hereinafter, referred to as 'second equipment'), and the second equipment is further divided into equipment (hereinafter referred to as 'second equipment') capable of acquiring imaging inspection information from the DICOM image information And equipment that does not use the DICOM method (hereinafter referred to as 'second-2 equipment').

The radiation imaging apparatuses differ in the way in which the patient's exposure dose value is determined according to the kind. The first equipment automatically extracts the exposure dose using the dose information reported through the DICOM header information. Here, the DICOM header information includes a plurality of data elements in a set format as shown in FIG. Each data element includes a tag, a VR (Optional), a VL (ValueLength), and a 'Value Field'. The tag consists of a 2-byte group number (Module) and a 2-byte element number. VR (Value Representation) indicates what kind of data the element has. VL (Value Length) And 'Value Field' means data of actual data elements. Of the equipment that does not report the dose value, the second-type equipment extracts the dose-related factor based on the DICOM header information and the DAP value of the look-up table is referred to using the extracted dose-related factor To calculate the exposure dose. If DICOM is not supported, the third program uses the NDD technique (Non Dosimeter Dosimetry) to estimate the expected dose because the 2-2 equipment can not use the look-up table.

The first to third programs are installed and operated in the dose management integration server 200 described later. The look-up table is stored in the database 400, which will be described below.

The NDD technique refers to a radiation dose indirect calculation method (Non Dosimeter Dosimetry). This is a method of estimating the amount of radiation that is not used during the examination based on the examination conditions. The examination conditions include tube voltage (kVp), tube current (mAs), filtration, Distance (FSD). The radiation dose indirect calculation method according to the present embodiment is expressed by Equation (1).

[Equation 1]

Where kVp is tube voltage, mAs is tube current, FSD is source-to-patient distance, A and B are 18.305 and 0.0027 respectively, and F _a is an indirect calculation factor for aluminum filter thickness and tube voltage. The indirect calculation factors are shown in Table 1 below.

[Table 1]

On the other hand, in the case of the second-second equipment, the third program calculates the expected exposure dose. At this time, a method of estimating the incident air kerma (EAK) value using the NDD technique is applied. The EAK value may be modified according to intraoral or panoramic radiography or dental CT.

In case of intraoral examination, EAK is calculated by Equation 2 below using kVp, mAs, filter thickness, and FSD (Focus-Source Distance), and the conversion table for the F function is shown in Table 2. Then, a dose area product (DAP) is calculated using Equation (3) for multiplying EAK by the area of the incidence point.

&Quot; (2) "

[Table 2]

&Quot; (3) "

, Where h (cm) is the major axis length of the collimator, and w (cm) is the minor axis length.

In the case of panoramic inspection equipment, kVp, mAs, total filtration (mmAl), slit length (cm) and DAP (mGy * ㎠) are the main input items.

&Quot; (4) "

, Where DAP_new (mGy * ㎠) is a newly calculated value according to the changed kVp, DAP_ref (mGy * ㎠) is a reference dose value input in advance, kVp_new is a newly input kVp value, kVp_ref is a reference value kVp value.

The relationship between DAP and mAs is shown in Equation (5).

&Quot; (5) "

Here, mAs_new is a newly input mAs, and mAs_ref is a previously input reference mAs.

The dental CT devices are kVp, mAs, total filtration (mmAl), FOV (㎠) and DAP (mGy * ㎠) as the main input items for dose estimation. The relationship is expressed by Equations (6) and (7).

&Quot; (6) "

, Where DAP_new (mGy * ㎠) is a newly calculated value according to the changed kVp, DAP_ref (mGy * ㎠) is a reference dose input in advance, and kVp_new is a reference kVp value newly input kVp kVp_ref.

&Quot; (7) "

, Where mAs_new is a newly input mAs, and mAs_ref is a previously input reference mAs value.

Since the DAP value is proportional to the FOV in the case of the dental CT apparatus, the DAP value according to the change of the FOV can be expressed by Equation (8).

&Quot; (8) "

, Where FOV_new is the newly inputted FOV and FOV_ref is the reference FOV value inputted in advance.

Items for inputting patient doses for each of the above radiographic equipment can be summarized as shown in Table 3 below.

[Table 3]

In the patient dose management system 100, a dose management integration server 200 is configured.

The dose management integration server 200 analyzes the information transmitted from the inspection equipment 110 to calculate an exposure dose value and calculates an exposure dose value calculated so as to calculate an effective dose of the patient, To the dose management server (300), and stores the effective dose value for each patient calculated by the effective dose management server (300) in the database (400). Of course, the dose management integration server 200 can inquire information such as an exposure dose and an effective dose stored in the database 400. In addition, the dose management integration server 200 operates in conjunction with the RF card system 500. In association with the RF card system 500, it is possible to store the patient-specific dose information in the individual RF card or to inquire the dose information using the individual RF card. Each RF card is an RFID tag. The memory is 1 KByte, of which 272 bytes are allocated to the management area and the remaining 752 bytes are allocated to the usable area. The 752 bytes are divided into a 32-byte personal information storage area, a 96-byte integrated information storage area, and a 624-byte accumulated card data storage area.

The above-mentioned exposure dose value is calculated by the first to third programs as described above. That is, if the first program analyzes the DICOM data and extracts the exposure dose according to whether or not the DICOM data is received, or if the DICOM data can not be received, the second program calculates the exposure dose referring to the dose related factor and the DAP value Or the third program estimates the expected exposure dose using the NDD technique.

The database 400 is connected to the dose management integration server 200. The database 400 stores a look-up table for each equipment, dose information for individual patients, and the like.

The look-up table 400 is configured to be able to know the dose information by selecting the type of the inspection equipment 110 and the exposed part, and is provided with a look-up table for each of the in-vivo radiation examination, panoramic radiography, Examples are shown in Table 4-1, Table 4-2, and Table 4-3. Table 4-1 shows the look-up tables of the radiological examiners, Table 4-2 shows the look-up tables of the panoramic radiographs, and Table 4-3 shows the look-up tables of the CT dental units.

[Table 4-1]

[Table 4-2]

[Table 4-3]

The database 400 also stores a patient's long term dose database for each test. As will be described later, the long-term dose database considers the types of inspections, scope of inspection, and tube voltage for each device.

For example, in the case of an in-vivo radiation examination, the angle of incidence of the radiation according to the type of examination and the oral structure of each patient is stored as shown in Table 5-1.

[Table 5-1]

In the case of panoramic radiography, the examination range is as follows. The dose area product (DAP) of the panoramic inspection is calculated by multiplying the dose width product (DWP) measured at the center of the secondary slit by the height of the 12th slit As a result, the height of the secondary slit is an important factor in dose calculation. In addition, depending on the slit height, the extent to which the x-rays are irradiated to the patient will vary, affecting the patient dose assessment. In this embodiment, the slit height is divided into 12 to 15 cm by 1 cm based on various data. This is shown in Table 5-2.

[Table 5-2]

In the case of dental CT examination, the type of examination, rotation angle, and examination range are shown in Table 5-3. Here, the type of test is determined by the area of the test and the scope of the test (Fiele of View: FOV).

[Table 5-3]

The long term dose database also stores the tube voltage range for each examination and the filter thickness range for each examination. This is because the intrauterine radiological examinations, the panoramic radiographs, and the dental CT examinations use different tube voltage ranges because they are different in purpose and method. The recommended minimum filter thickness depends on the tube voltage range available in the instrument. The filter thickness to be installed differs depending on the type of inspection, because the tube voltage range to be used is different. This is summarized in Table 6-1, Table 6-2, and Table 6-3.

[Table 6-1]

[Table 6-2]

[Table 6-3]

The database also stores patient-specific information, as shown in Table 6-4, and information for patient-specific cumulative doses, as shown in Table 6-5. Of course, the information in Table 6-4 is based on being stored in the local database of each medical institution that has examined the patient, and the information in Table 6-5 may be recorded in the RF card of the patient himself.

[Table 6-4]

[Table 6-5]

The RFID card system 500 may be configured according to the patient dose management system 100 of the present invention. This is to store the accumulated information of the patient using the RFID card. For example, in order to conveniently manage the accumulated dose of a patient, the patient visits not only a designated medical institution but also a plurality of medical institutions. However, since the RFID card system 500 has been already known in the related art, a detailed description thereof will be omitted in the present embodiment. The memory area of the RF card carried by the individual patient has been described above.

The effective dose management server 300 associated with the dose management integration server 200 according to the present invention is a means for calculating / evaluating the actual patient exposure dose. In other words, the patient's dose information is represented as the dose area product (DAP), but it is difficult to evaluate the actual patient's dose because it is an indicator of the actual amount of exposure of the patient to radiation. Therefore, it is necessary to calculate an effective dose finally derived at the time of evaluating the patient dose as a standard for the patient dose, which is performed by the effective dose management server 300.

The effective dose management server 300 is provided with a factor derivation unit 310 for deriving factors necessary for effective dose calculation for each inspection type and an effective dose calculation program 320 for calculating an effective dose of the patient.

The parameter derivation unit 310 includes factors necessary for evaluating the dose of the final patient by the dental imaging examination and factors affecting the radiation dose per dental imaging examination. That is, the amount of radiation depends on the intensity and amount of the x-rays generated in the x-ray generator, and the x-ray is determined by various conditions such as the tube voltage of the dental imaging apparatus, And changes in these conditions directly affect patient dose. Therefore, it is necessary to examine factors affecting radiation dose and patient dose assessment.

These factors include irradiation doses, absorbed doses, equivalent doses for the human body impact of radiation, effective doses obtained through these dose values, and radiation dose information used in dental imaging. (ESD) defined as the absorbed dose, the incident air kerma (EAK), which is a measure of the amount of radiation traveling into the air in the absence of the patient, the dose width product (DWP) (DAP), which is defined as a value obtained by multiplying the incidence air cursors at any point of the x-ray by the cross-sectional irradiated area at that point, and the radiation dose The tube voltage (kVp) and tube current time (mAs) to determine image quality, filtration to remove unnecessary x-ray and scatter line, (FSD), which is the distance from the focus of the x-ray tube to the patient's x-ray incidence surface, the distance from the x-ray origin to the film or sensor forming the image, (SID), a rotation angle that determines the scan area the patient is receiving, a rotation orbit indicating the path along which the x-ray generator scans the patient's area of interest, a beam shape that determines the rotation angle in the dental CT device , Half beam), patient characteristics, and radiation dose specific to each equipment.

These factors can be summarized as shown in Table 7 according to three examinations: intra-oral radiography, panoramic radiography, and dental CT examination.

[Table 7]

The reason for deriving the factors as described above is that the dental radiography is classified into intra-oral radiography, panoramic radiography, and dental CT according to the examination equipment. To evaluate the patient's exposure dose due to each dental radiography examination, , And the intensity of radiation emitted during the test.

The effective dose calculation program 320 installed in the effective dose management server 300 is provided as a program for an in-vivo radiation examination, a panoramic radiation examination, and a dental CT examination, respectively, according to the dental radiography type. These respective programs are shown in Figs. 3A to 3C. The configuration and operation of the program will be described in detail below.

Here, the calculation method of the effective dose is given priority.

The effective dose is an index indicating the effect of radiation on the human body as described above. In this embodiment, the effective dose is evaluated using the dose area product (DAP), which is dose information that appears in each examination.

Effective dose conversion factor (D-Factor) is required to calculate the effective dose. The effective dose conversion factor (D-Factor) is a factor that converts the dose area product (DAP) provided at the time of dental imaging into the effective dose which is a reference index so as to evaluate the radiation effect on the actual patient. Based on this, the effective dose is calculated by the following equation (9).

&Quot; (9) "

The effective dose conversion factor (D-factor) can be expressed by the following Tables 8-1, 8-2, and 8-3 for each of the three types of tests. Here, the effective dose conversion factor for a dental CT scan is a full beam and is 360 °.

[Table 8-1]

[Table 8-2]

[Table 8-3]

Next, the effective dose calculation program 320 will be described.

The effective dose calculation program 320 is a program developed to easily calculate the radiation dose of a patient due to dental radiography, that is, an in-vivo radiation examination, a panoramic radiography examination, and a dental CT examination.

4 is an exemplary diagram showing an initial screen of an effective dose calculation program according to the present invention. In this case, the selection condition of the dental radiography test type, the patient information selection window for selecting the age / sex of the patient, the test type setting window for selecting the detailed test type of each dental radiography, the test condition such as tube voltage / tube current amount / A selection window for selecting an effective dose evaluation method of ICRP 60 and ICRP 103, a display window for displaying the calculated long term dose and effective dose, and the like are set. The calculation unit for calculating the long-term dose and the effective dose is implemented by a series of algorithms or software and provided to the program.

In the calculation of the dose using the effective dose calculation program, when the operator manipulates various selection, setting, and input information displayed on the screen, the long term dose and the effective dose value for the region to be examined are calculated and displayed.

The above-described effective dose calculation process will be described in more detail, for example.

First, set the radiation dosage for each device. Table 9 shows the setting values for each kind of dental examination. At this time, only the setting values are inputted for the panoramic radiographic examination and the dental CT examination because the radiation dose values are different for each inspection equipment.

[Table 9]

An example of the environment setting for each equipment is shown in FIG.

Next, as shown in FIG. 6, one of the types of examination is selected from an intraoral examination, a panoramic examination, and a dental CT examination by operating the examination type selection window. Fig. 6 is an exemplary view in the case where intra-oral radiation examination is selected. Exemplary drawings according to the following description also illustrate screens of intra-oral radiation examinations.

Then, the age and gender information of the patient is selected using the patient information selection window, and then the type of test, the region to be examined, and the like are set according to the type of the patient using the type-of-test setting window as shown in FIG. Also, as shown in FIG. 8, inspection conditions are inputted through the inspection condition input window. Inspection conditions include tube voltage, tube current, total filter thickness, focal surface distance (FSD), and incident air coma (EAK). Then, a selection window is displayed to select either ICRP 60 or ICRP 103, and a long-term dose and an effective dose are calculated by pressing a calculation button as shown in FIG. At this time, the total incidence surface area (mGy) and the dose area product (mGy 2) are automatically calculated through the incident air kerma (EAK).

The overall operation of the patient dose management system of the present invention is as follows. This is illustrated in FIG. 10, which shows the flow of the operation process.

The examination type of one of the intra-oral radiographic examination apparatus, the panoramic radiographic examination apparatus, and the dental CT examination apparatus is selected (s100). Then, the patient is photographed with the examination equipment (s110).

The dose management integration server 200 receives the DICOM data from any one of the inspection equipment 110 or the PACS server 120 and extracts the dose information according to the operation of the effective dose calculation program 320. If the test instrument does not support DICOM data or does not receive DICOM data, the expected exposure dose is calculated by the NDD method (s120).

The calculated dose information is stored in the database 400. At this time, the dose information stored in the database 400 may be executed in the RF card system 500 and stored in the patient-specific RF card (s130).

The stored dose information may be inquired through the effective dose program or inquired through the RF card system 500 (s140).

Thus, in the present embodiment, the patient dose information is automatically calculated as the effective dose during the in-vivo radiation examination, panoramic radiation examination and dental CT examination at the time of dental treatment, and cumulative management is carried out to calculate the patient dose management system As shown in FIG.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent that modifications, variations and equivalents of other embodiments are possible. Therefore, the true scope of the present invention should be determined by the technical idea of the appended claims.

110: Inspection equipment
120: PACS Server
200: Dose management integration server (including first to third programs)
300: Effective dose management server
310:
320: Effective dose calculation program
400: Database
500: RF card system

Claims (7)

Inspection equipment for intraoral radiography, panoramic radiography, and dental CT examination;
A dose management integration server for analyzing information transmitted from the inspection equipment and calculating an exposure value; And
And an effective dose management server in which an effective dose calculation program is installed to calculate an effective dose of the patient using the dose value,
Said inspection equipment comprising: a first device for calculating a dose using DICOM header information; A second-1 equipment for calculating a dose with reference to a DAP value of a pre-provided look-up table among equipment not reporting the exposure value; And a second-2 equipment for calculating a dose using the indirect dose calculation method (NDD). delete The method according to claim 1,
Wherein the NDD method is calculated by the following equation.

,
Where kVp is tube voltage, mAs is tube current, FSD is source-to-patient distance, A and B are 18.305 and 0.0027, respectively, and F _a is an indirect calculation factor for aluminum filter thickness and tube voltage. The method according to claim 1,
The DICOM header includes:
A plurality of data elements are configured in a set form,
Each said data element comprising:
A tag consisting of a 2-byte group number (Module) and a 2-byte element number (item);
A Value Representation (VR) that represents what type of data the element has;
VL (Value Length) indicating the size of the element value; And
And a 'Value Field' which is data of an actual data element. The method according to claim 1,
Wherein the effective dose management server comprises:
Further comprising a factor derivation unit for deriving factors necessary for calculating the effective dose in accordance with the intraoral radiography, panoramic radiography, and dental CT examination,
Wherein the factor derivation unit includes a factor affecting the dose of the test and a factor necessary for evaluating the dose of the final patient according to the test. 6. The method of claim 5,
Wherein the effective dose is calculated by the following equation.

,
Where D-Factor is the effective dose conversion factor The method according to claim 1,
Wherein the effective dose calculation program comprises:
Dental radiography examination type selection window;
A patient information selection window for selecting the age / sex of the patient;
A screen for setting the examination type to select the type of detailed examination of each dental radiography;
A test condition input window for inputting test conditions such as tube voltage, tube current amount, and total filter thickness;
A selection window for selecting an effective dose assessment method of either ICRP 60 or ICRP 103; And
And a display window for displaying the calculated long term dose and effective dose is set.

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