CN204654941U - A kind of scale of locating for DSA image, measuring and calibrating - Google Patents

Abstract

This utility model relates to a kind of scale of locating for DSA image, measuring and calibrating, this scale comprises banded chi body, it is characterized in that, described chi body is made up of the upper chi body be bonded together up and down and lower chi body, wherein, the upper surface of described upper chi body is provided with equidistant graduation mark along its length, is provided with sequence number between two adjacent graduation marks; On the upper surface of described lower chi body, position corresponding to graduation mark set on upper chi body is provided with point-like graduation mark, position corresponding to the odd number of sequence number set on upper chi body is provided with odd indexed, each odd indexed is all set in a circle, and the upper end of the point-like graduation mark of each odd indexed both sides is provided with point-like line; Wherein, described point-like graduation mark and point-like line are by the some composition equidistantly distributed, and the distance between the point of composition point-like graduation mark equals the distance formed between the point of point-like line; Described point-like graduation mark, point-like line, odd indexed and circle are lead metal material and make.

Description

A Ruler for DSA Image Positioning, Measurement and Calibration

technical field

The utility model relates to the measurement for the purpose of diagnosis, in particular to measuring the size of the body in cooperation with a radiological diagnostic instrument.

Background technique

Interventional surgery has been favored by many doctors and patients because of its advantages of less trauma, low complications, and wide adaptability. The location of diseased tissue and blood vessels, and the measurement of the size of the range are the guarantees of successful treatment. DSA (Digital subtraction angiography) , digital subtraction angiography) as its only imaging aid, the simplicity and feasibility of the measurement method, and the accuracy of image calibration are particularly important.

1. In previous operations, X-ray-opaque surgical forceps or catheter tip placement, type pasting and other methods were often used for positioning, combined with human bony markers for judgment. These methods are time-consuming and labor-intensive on the one hand; The skin is pulled and shifted, and the positioning is not accurate or fails.

2. Since the DSA image is formed by the cone beam rays emitted by the X-ray tube through the human body and then reconstructed by computer analog-to-digital conversion, most of the resulting images have magnification and distortion. It is often necessary to accurately calibrate the magnification ratio in order to measure the true size of diseased tissues and blood vessels. Conducive to the selection of treatment equipment, the previous calibration methods mainly include ① the machine has an ionization chamber function, and the machine automatically measures and calculates according to the distance between the lesion tissue layer and the operating table; , ③ comparative measurement according to the diameter of the catheter in the interventional operation. The disadvantages of the above are: ①The distance between the lesion tissue and the operating table is automatically set to a certain value by default, but in reality this distance will vary with the change of the lesion position, and the calibrated results often have errors. ②: Although it can Make up for the shortcomings of ①, but the preoperative preparation is complicated, time-consuming and laborious. ③The premise is that the diseased blood vessel or tissue and the catheter must be in the same field of view and at the same level. Blood vessels and catheters cannot be guaranteed to be displayed in the same image field of view.

Contents of the invention

The technical problem to be solved by the utility model is to provide a ruler for positioning, measuring and calibrating DSA images. success rate.

The scheme that the utility model solves the problems of the technologies described above is as follows:

A scale for DSA image positioning, measurement and calibration, the scale includes a strip-shaped scale body, characterized in that the scale body is composed of an upper scale body and a lower scale body bonded together up and down, wherein,

The upper surface of the upper scale body is provided with equidistant scale lines along the length direction, and serial numbers are arranged between adjacent two scale lines;

On the upper surface of the lower scale body, dotted scale lines are provided at the position corresponding to the scale line set on the upper scale body, and odd serial numbers are set at the odd-numbered positions corresponding to the serial numbers set on the upper scale body, and each odd serial number are set in a circle, and the upper ends of the dotted scale lines on both sides of each odd serial number are provided with dotted lines; wherein, the dotted scale lines and dotted lines are composed of equidistantly distributed points, Moreover, the distance between the points forming the dotted scale lines is equal to the distance between the points forming the dotted lines; the dotted scale lines, dotted lines, odd serial numbers and circles are all made of lead metal material.

Since people use decimal counting in their daily life, in order to facilitate understanding and reading, a preferred solution of the present invention is that the distance between the scale marks is 10 mm, and the diameter of the circle is also 10 mm. The distance between the points forming the dotted scale line and the points forming the dotted connecting line is equal to 2mm.

It can be seen from the above scheme of the scale described in the present utility model that since the dotted scale lines, dotted lines and odd serial numbers on the lower body are all made of X-ray-opaque lead metal material, the scale is placed on the lesion. Tissues are on the same plane, and when DSA imaging is performed together with the human body, the dotted scale lines, dotted lines, odd serial numbers and circles on the lower body will be developed on the same DSA image as the human tissue, so that not only can the DSA Direct readings on the image, and can provide the calibration standard value of blood vessels and tissue images at any angle of X-ray, that is, the point spacing is used for the front view, and the circle diameter image distance is used for the oblique view. The radial line is parallel to the diameter of the ellipse).

Description of drawings

Fig. 1, Fig. 2 and Fig. 3 are the structural representations of a specific embodiment of the scale used for DSA image positioning, measurement and calibration described in the utility model (truncated enlarged view), wherein, Fig. 1 is a main view, and Fig. 2 is a bottom view Fig. 3 is a sectional view of A-A of Fig. 2 .

Detailed ways

Referring to Figures 1 to 3, the scale described in this example is a strip-shaped scale body with a length of 80 cm, which is composed of an upper scale body 1 and a lower scale body 2 bonded together up and down.

Referring to Fig. 1, the upper surface of the upper scale body 1 is provided with a scale line 1-1 with a distance equal to 10mm along the length direction, and a serial number 1-2 is set between two adjacent scale lines 1-1.

Referring to Fig. 3 and Fig. 1, on the upper surface of the lower scale body 2, a dotted scale line 2-1 is provided corresponding to the position of the scale line 1-1 set on the upper scale body 1, corresponding to the position on the upper scale body 1. An odd number 2-2 is set at the odd number position of the set number 1-2, and each odd number 2-2 is set in a circle 2-3 with a diameter equal to 10 mm, and each odd number 2-2 is placed on both sides The upper end of the dotted scale line 2-1 is provided with a dotted line 2-4; wherein, the dotted scale line 2-1 and the dotted line 2-4 are both composed of points with a distance of 2 mm; The dotted scale lines 2-1, dotted lines 2-4, odd serial numbers 2-2 and circles 2-3 are all made of lead metal material.

The method of using the ruler for DSA image positioning, measurement and calibration described in the present invention will be illustrated below with reference to the accompanying drawings.

1. Application in the positioning of spinal cord angiography: stick the ruler vertically on the back of the patient at will, and under the perspective, the corresponding relationship between each vertebral body and the odd number 2-2 on the ruler can be directly obtained, then the sequence relationship of each spinal artery Appear one by one.

2. Application in cerebral arteriography: fix the ruler next to the skull, and make the height of the ruler and blood vessels the same, and then perform DSA image acquisition. When there is no need for fine measurement, the operator only needs to observe the lead metal dot spacing of the dotted scale line 2-1 or the dotted line 2-4 to visually measure the size of the diseased tissue or blood vessel. When fine measurement is required, the comparison measurement can be carried out according to the projected diameter of the circle 2-3. When the X-ray tube is projected obliquely, the circle 2-3 is displayed as an ellipse, and it is only necessary to keep the measurement diameter and Accurate data can be obtained by ellipse calibration diameter parallel. 3. Application in abdominal aorta and peripheral coronary vessels: place the ruler on the same plane as the diseased tissue or blood vessel, and form a dotted scale line 2-1 or a dotted connection line 2-4 at the same position after image acquisition The distance between the lead metal points is the benchmark value for comparison. In order to reduce the error of visual inspection, the distance between multiple lead metal points on the long axis (integer multiples of 1CM) can be used for calibration and measurement, which can ensure that the results are consistent with the actual situation.

Claims (2)

1. the scale of locating for DSA image, measuring and calibrating, this scale comprises banded chi body, and it is characterized in that, described chi body is made up of the upper chi body be bonded together up and down and lower chi body, wherein,

The upper surface of described upper chi body is provided with equidistant graduation mark along its length, is provided with sequence number between two adjacent graduation marks;

On the upper surface of described lower chi body, position corresponding to graduation mark set on upper chi body is provided with point-like graduation mark, position corresponding to the odd number of sequence number set on upper chi body is provided with odd indexed, each odd indexed is all set in a circle, and the upper end of the point-like graduation mark of each odd indexed both sides is provided with point-like line; Wherein, described point-like graduation mark and point-like line are by the some composition equidistantly distributed, and the distance between the point of composition point-like graduation mark equals the distance formed between the point of point-like line; Described point-like graduation mark, point-like line, odd indexed and circle are lead metal material and make.

2. a kind of scale of locating for DSA image, measuring and calibrating according to claim 1, it is characterized in that, distance between described graduation mark is 10 ㎜, the diameter of described circle is also 10 ㎜, and the distance formed between the point of described point-like graduation mark and the point of composition point-like line equals 2 ㎜.