DE7909044U1 - Radio mecometer - Google Patents

Description

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DR. MED. J. FlSCHER-WASELS

SPECIALIST IN ORTHOPEDICS

SCHWACHHAUSER HEERSTR. 93

TELEPHONE 34 64 54
SCHWACHHAUSER HEERSTR. 93.2800 BREMEN 'SALES HOURS: 4 PM - 6 PM

EXCEPT WED U. SO. U. BY AGREEMENT

German Patent Office clinic: Kurforstenklinik.

"., .. ,, η _Λ η IN THE VAHR 65

- Zweibruckenstrasse 12 -

Munich 2 Bremen, ^{March 29, 1979}

Subject .: Registration of utility model protection,
Ausk-St. Tgb no. 974/79

This is a measuring stick made of a metal that is impermeable to X-rays (e.g. brass), which is approx
Is 1 m long or longer; and which one lengthwise
Centimeter-number classification for the purpose of length measurement engraved. The engravings have to go through so that the X-ray beam that hits them images the relevant numbers on the X-ray film underneath.

The measuring stick must be at least 4, ο cm wide and on each
On the side on the long edge next to the numbers, carry fine horizontal lines ii centimeter graduation "engraved through" and also half-centimeter lines in order to achieve the greatest possible accuracy.

The measuring stick is exactly parallel and lengthways between « put the patient's legs on the X-ray table so that it lies over the grid of the X-ray table; through this an image of the staff and their numbers and lines takes place on the X-ray film.

Since this is a comparative measurement of the leg length, after the X-ray films have been made
each ir. height of the desired body parts (eg hip joint and ankle joint) each 2 of the straight lines engraved on the measuring stick connected to one another by a pencil line.
This then results in a line that is exactly at right angles to the longitudinal axis of the measuring rod or de: legs

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DR. MtO. U.F

SPECIALIST IN ORTHOPEDICS

SCHWACHHAUSER HEERSTR. 93 TELEPHONE 34 64 54

EXCEPT WED U. SO. U. BY AGREEMENT

CLINIC: KURFORSTENKLINIK. - 2 - IN VAHR 65.

March 29, 1979

BREMEN, the

enables ^ the length of the legs comparatively to the millimeter - by subtracting "or adding the numbers in ^;; the middle of the measuring stick - to be read.

5iS ^ ££ iSS £ _§i§S ^ -. Ä ^e i_% §i £ 2iF ¹ i ¹ i ^: £ i ⁿ £ § £ k !! _ i§e ssung ^: Usually the doctor measures the leg length with an ordinary one centimeter from the iliac crest to the lateral malleolus (. the so-called direct method) or by inferiority of different heights Holzbrettchen known thickness under the foot of the shortened leg feiRBi indirect to Beck tie (= method Both are very imprecise measurement methods because of the soft tissues of the human body X-ray measurement. \ .

Much more accurate is the measurement of the skeleton (i.e. the bones) with the help of so-called "whole-body recordings", whereby the whole. * Body or at least the whole lower body is shown on an X-ray film. For this you need pilms or cassettes of 100 or 12o cm length, a special and "very expensive X-ray apparatus and because of the object distance ^: a particularly strong X-ray tube of at least 3.0 m in the whole of BrmfflHn (with 750,000 inhabitants) does not exist.

As a result, other X-ray processing methods were used as early as 50 years ago tried, but all of them are also time-consuming and imprecise:

a) Teleradiography (HIOKEY 1924) is the aforementioned full-body image (see above), which are still due to the different thicknesses of the body parts and X-ray permeability special X-ray filters are required for uniform representation (LEGER 1960, GAJEWSKI 1956, OEST and SIEMBURG J§71)

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SCHWACHHAUSER HEERSTR. 93.2800 BREMEN

DR. MED. ο. FISHERMAN ^ w'ASELS

SPECIALIST IN ORTHOPEDICS

SCHWACHHAUSER HEERSTR. 93 TELEPHONE 34 64 54

SPECHZE.T: 4 - 6 PM EXCEPT WED. U. SO. U. BY AGREEMENT

CLINIC: KURFURSTENKLINIK. IN THE VAHR 65

BREMEN, THE

b_2 Scanography (WILLWEE 1937) With this X-ray measuring method a narrow bundle of rays, generated by a special diaphragm in front of the tube, moves slowly horizontally during the Recording over the table or the patient. Here, too, the very large film cassette and the expensive Rö-apparatus are required; furthermore, the production is because of the complexity! the technology burdened with a high error rate.

cj_ Orthoradiography (GREEN, WYATT and ANDERSON 1946, BET.L and THOMPSON 1950, TAILLARD 1956 and GOi ¹ P 1960). Here the X-ray beam runs exactly at right angles to the table - as in b); but you need a special frame on the measuring table, in which the patient must be fixed. Individual parts of the legs are shown one after the other, but there is only a measurement option for one leg - so there is no exact comparative method.

= translated:

The advantage of the measuring stick mentioned on page 1 of this description is that it is easy to use: it must be exactly parallel placed between both legs of the patient. You can use any common X-ray device (4-pulse device and stronger) and requires the usual 1 m distance as well as the common film sizes (18x24 for feet and 20x40 or 3ox40 cm for hips and pelvis). - The patient's body needs not to be particularly fixated. Nor is it necessary that the pelvis or feet be accurate on any basis lie horizontally; a later recognizable parallel shift e.g. can be eliminated by arithmetic compensation. A picture of the pelvis is now made in the usual way; at the same time move the tube over the

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TVD VACn _I CICrUCO-WARPI.C SPECIALIST IN ORTHOPAEDICS SCHWACHHAUSER HEERSTR. 93

TELEPHONE 34 64 54

! 'SCHWACHHAUSER HEERSTR. 93.2800 BREMEN 'SALES HOURS: 4 PM - 6 PM

^! EXCEPT WED U. SO. U. BY AGREEMENT

CLINIC: KURFORSTINKLINIK. _ A _ IN THE VAHR 65

BREMEN. ^ 2 9, (fciS79

Patient "or above the table and shoots one further exposure of the feet, in that the grate beam now hits exactly orthogonally, i.e. perpendicular to the table top. As a result, there is no significant distortion -

i \ * "" as is the case, for example, with teleradiography.

So far there has been no method of x-ray measurement that

comparatively visible on a measuring stick on the x-ray image i
ί could be done. Furthermore, there was still no exact method

'■ the one without the large cassette (1 - 1.2 m) and an elaborate one

X-ray machine got along.

If a comparative measurement, e.g. of the lower leg against the upper leg, is required, the same will be used Storage only made an additional knee image (24x30 cm film), on which the measuring rod is also included is recognizable in their engravings.

/ Λ It is necessary to take 2 recordings for the stated purpose

1-2 minutes and no special additional training for staff.

Literature ;

E.MORSCHER and GS ¹ IGWER: "The measurement of leg lengths",

The Orthopedist, Volume 1/9/1972.

E.MORSCHER: "Itiology and clinic of leg length differences The Orthopedist, Volume 1/1/1972.

¥ .TAILLARD: "The radiological methods for measuring the long tubular bones ", magazine for orthopedics

Volume 88/151/1957.

All other references can be found there.

Claims (1)

1.) RADIO-MÄKO-METER with numbers and lines, characterized by a measuring stick made of a radio-opaque Metal (e.g. brass) approx. 1 meter long and at least 4 cm wide. The lines and numbers are "engraved" or "engraved through" the metal, so that the X-rays can pass through. The division of lines is continuous on both sides near the edge of the radio mecometer, whereby the lines on the right and left are exactly at the same height, 2.) RADIO-MÄEO-METER, characterized in that the The measuring stick is made of plastic and its lines and numbers are made of a radio-opaque material (Metal) are glued on or embedded. 11. b.