Basic knowledge of medical imaging over the years (63)-Tianjin medical and health in 2020

Basic knowledge of medical imaging over the years (63)-Tianjin medical and health in 2020

1. The f

Basic knowledge of medical imaging over the years (63)-Tianjin medical and health in 2020

Basic knowledge of medical imaging over the years (63)-Tianjin medical and health in 2020

1. The following description about preparation before CT examination is incorrect:

A. the tube should be preheated before CT equipment inspection.

B, remove metal foreign bodies in patients.

C. enhanced scanning of patients to sign informed consent.

For patients who have no contraindications to enhanced scanning, an informed consent form for enhanced scanning should be signed.

E. Patients undergoing cardiac examination don't need to be trained to hold their breath.

2. For chest CT scanning technology, the following are not suitable:

A. The patient is lying on his back, with his head leaning forward and his arms raised.

B. the scanning baseline starts from the apex of the lung.

C conventional chest scanning adopts spiral scanning, and the interval between layers is 5 mm

D. When observing hilar vascular and mediastinal lesions, routine plain scan is enough.

E patchy and nodular shadows of the lung can be slowly adjusted from the lung window to the mediastinal window.

3. In clinical application, commonly used non-spiral CT scanning is:

A. Abdomen

B. Spine

C. pelvic cavity

D. cellulose triacetate

E. chest

4. Which of the following CT postprocessing techniques is the least suitable for bone examination:

A. Malleable Iron Pipe

B.MinIP

C. virtual reality

D. solid (magnetic) disk

E. periodicals

5. The following description about oral and maxillofacial CT examination is wrong:

A. Soft tissue window is commonly used for facial photography, and bone window is needed for nasopharyngeal photography.

B, the positioning image adopts the head lateral positioning image.

C the thickness interval between the scanning layers of parotid gland and nasopharynx is 5 mm

D. The scanning range, slice thickness and slice spacing of maxillofacial enhanced scanning are the same as those of plain scanning.

E continuous scanning or spiral scanning with the pitch of 1 can be performed during enhanced scanning.

6. The following hardware systems that do not belong to CT equipment:

A. scanning frame

B. sight

C. filter

D. detector

E. comfort

Reference answer and analysis

1. Reference answer E. Analysis: The examination of the heart also needs breathing training and breath-holding training. In addition, the preparation before CT examination includes equipment preparation, patient preparation, contrast agent and first aid articles preparation, and operator preparation.

2. Reference answer D. Analysis: In chest CT photography, if it is necessary to distinguish hilar vessels from lymph nodes, or to observe mediastinal lesions, chest enhancement scanning can be performed. For diffuse and interstitial lung diseases, especially suspected bronchiectasis, high-resolution scanning mode was adopted, and the interval between layers was 2mm, and high-resolution algorithm was used for reconstruction.

3. Reference answer B. Analysis: Generally, the skull and spine are scanned by non-spiral, while the chest, abdomen, pelvic cavity and CTA are scanned by spiral.

4. Reference answer B. Analysis: This question examines the mastery of CT post-processing technology in both Chinese and English. In addition, it is necessary to be familiar with the application of each post-processing technology. MIP: Maximum density projection, which is mainly used for calcification of blood vessel wall, is also sensitive to changes in bone density caused by fractures, bone tumors and osteoporosis. MinIP: minimum density projection, mainly used for gas-containing organs with obviously low density, such as gastrointestinal tract and bronchus. VR: High-resolution volume rendering technology, applied to soft tissues, blood vessels and bones. SSD: Surface covering technology, suitable for bones and blood vessels. MPR: Multiplane recombination, suitable for all systems of the whole body.

5. Reference answer C. Analysis: The thickness interval of parotid scanning is 2~3mm, and the thickness interval of nasopharyngeal scanning is 5 mm. ..

6. Reference answer E. Analysis: X-ray generation system includes X-ray generation system and data acquisition system, mainly including scanning frame, X-ray tube, collimator, filter (plate), detector, analog-to-digital converter, high-voltage generator, scanning bed and so on. Software system includes computer and image reconstruction system, console, workstation, etc. Therefore, choose e in this question.