Basic knowledge of medical imaging past exam questions (63)-202020 Tianjin medical health
1. The following description of the preparation for the CT examination is wrong:
A. CT equipment should be preheated by the bulb tube prior to the examination
B. The patient removes the metal foreign body
C. For patients with enhanced scans sign the informed consent
D. For patients with enhanced scans sign the informed consent
D. For patients with enhanced scans sign the informed consent
C. Informed consent should be signed for patients with enhanced scans
D. Informed consent for enhanced scans should be signed for patients without contraindications to enhanced scans
E. Breath-holding training is not necessary for patients with cardiac exams
2. For the technique of chest CT scanning the following is inappropriate:
A. The patient is lying on his back with his head advanced and arms raised to hold his head
B. The patient is lying on his back with his head advanced and arms raised to hold his head
3. B. The scanning baseline starts from the lung apex
C. The routine chest scanning adopts spiral scanning, and the layer spacing is 5mm
D. When observing the pulmonary vessels and mediastinal lesions, it is sufficient to adopt the routine flat scanning
E. For the flaky and nodular shadow of the lungs, it can be adjusted from the lung window to the mediastinal window slowly
3. In clinical application, non-helical CT scanning is commonly used to perform the scanning. Non-spiral CT is commonly used for scanning:
A. Abdomen
B. Spine
C. Pelvis
D. CTA
E. Chest
4. Which of the following CT post-processing techniques is the least suitable for application to the examination of bone:
A. MIP
B. MinIP<
C.VR
D.SSD
E.MPR
5. The following is an incorrect description of CT examination of the oral and maxillofacial region:
A. A soft-tissue window is commonly used for facial photography, and a bone window is required for nasopharyngeal photography
B. The localization image adopts the lateral head localization image
C. Thick-layer spacing is chosen for conventional scanning of parotid and nasopharyngeal regions. D. Maxillofacial enhancement scanning range, layer thickness and layer spacing are the same as plain scanning
E. Enhancement scanning can be continuous scanning or spiral scanning with a pitch of 1
6. The following do not belong to the hardware system of the CT equipment:
A. Scanning frame
B. Collimator
C. Filter p> C. Filter
D. Detector
E. Console
Reference Answers and Explanations
1. Reference Answer E. Explanation: Breathing exercises are also required for cardiac exams and breath-holding exercises are performed. In addition, the preparation for a CT examination includes four major aspects: equipment preparation, patient preparation, preparation of contrast and first aid items, and operator preparation.
2. Answer D. Explanation: Chest enhancement scans can be performed on chest CT to identify hilar vessels and lymph nodes or to visualize mediastinal lesions. As well as for diffuse, interstitial lesions in the lungs, especially when suspected of bronchiectasis using high-resolution scanning mode, layer thickness layer spacing selection of 2mm, using high-resolution algorithm reconstruction.
3. Answer B. Explanation: The skull and spine are generally scanned in a non-helical manner, while the chest, abdomen, pelvis, and CTA are scanned in a helical manner.
4. Reference answer B. Analysis: This question examines the mastery of CT post-processing techniques in English and Chinese, in addition to the need to be familiar with the application of each post-processing technology. MIP: maximum density projection, mainly used in blood vessel wall calcification, bone fractures, bone tumors, osteoporosis, etc., caused by the change in bone density is also very sensitive. low air-containing organs, such as the gastrointestinal tract, bronchial tubes, etc. VR: volumetric reproduction technique, characterized by high resolution, applied to soft tissues, blood vessels and bones. SSD: surface masking technique, suitable for use in bones, blood vessels. MPR: multiplanar reorganization, suitable for each system of the whole body.
5. Reference answer C. Analysis: parotid scanning layer thickness layer spacing is the same using 2~3mm, nasopharyngeal scanning layer thickness layer spacing is 5mm.
6. Reference answer E. Analysis: X-ray generation system includes X-ray generation system and data acquisition system, mainly scanning frame, X-ray tube, collimator, filter (plate), detector, analog-to-digital converter, high voltage generator, scanning examination bed, etc.. , scanning examination bed, etc. The software system includes the computer and image reconstruction system, console, workstation and so on. Therefore, the question choose E.