Basic knowledge of medical imaging over the years (29)-Tianjin medical and health in 2020

1. The Meyer position of mastoid requires the head to turn to the side to be examined. How many degrees does the sagittal plane of the head make with the bed surface?

.25 caliber?

B.35？

C.45？

D.30？

E.50？

2. How many degrees does the Xu Shi center line of mastoid incline to the foot side, and inject it into the center of the cassette through the mastoid of the inspected side:

.30 caliber?

B.20？

C.25？

D.33？

E.45？

3. The right center line of the rib on the diaphragm is injected horizontally through which of the following parts:

A. the midpoint of the connecting line between the lower angles of the two scapulas

B. Fifth thoracic vertebra

C. Level of costal diaphragm angle

D. sternal angle

E. the seventh thoracic vertebra

4. Alignment of the center line of the positive and oblique position of the foot:

A. Third metatarsophalangeal joint

B. Third toe joint

C. second phalanx center

D. the base of the toe of the third metatarsal.

E. None of the above

5. During exposure, the breathing pattern of the ribs below the diaphragm is as follows:

A. Take a deep breath and hold your breath after exhaling.

B. Hold your breath after taking a deep breath

C. Hold your breath under calm breath.

D. Hold your breath after taking a deep breath

E. None of the above

6. The narrative of 6.DSA imaging is wrong:

A.DSA？ Digital subtraction angiography

B. Mask and plain film are the same image.

C. mask? Paper clamping frame

D, subtracting the contrast image from the non-contrast image to obtain a blood vessel image.

Reference answer and analysis

1. Reference answer C. Analysis: This paper mainly investigates the special angle in the position requirement of mastoid Meyer photography: the head turns to the side to be examined, and the sagittal plane of the head forms a 45-degree angle with the bed surface. So choose C.

2. Reference answer C. Analysis: Xu Shi position of mastoid: the center line inclines to the foot side at an angle of 25 degrees, and is injected into the center of the cassette through the mastoid of the measured side. So choose B.

3. reference answer a. analysis: through the midpoint of the connecting line between the lower angles of the two scapula, horizontally inject into the right center line of the upper diaphragm rib. So choose a.

4. reference answer a. analysis: mainly investigate the projection posture of the foot: the midline of the foot should be aligned with the third metatarsophalangeal joint when it is tilted forward and backward. So choose a.

5. Reference answer B. Analysis: The right exposure of the diaphragm is to take a deep breath and then hold your breath. This way of breathing can open the chest and make the ribs obviously developed. So choose B.

6. reference answer B. analysis: an image that is exactly the same as the image made in the film, but with the opposite density.

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