Computed tomography (CT) Board Review - Body CT The Essentials

Computed tomography (CT) Board Review - Body CT The Essentials 1. Computed tomography (CT) is at the heart of every modern radiology department because of its: 1. speed 2. reliability 3. ability to separate overlapping structures: 1, 2, & 3 2. The primary interaction with the anode is excitation resulting in radia- tion.: Infrared (heat) 3. T/F: X-rays pass through the patient interacting with tissue by absorption or scattering, which results in a measured attenuation of the incident beam.: True 4. Once the data has been acquired, the CT gantry rotation and the computer renders the raw projection data as an image set.: Decelerates 5. A sharpening kernel is commonly referred to as a kernel used to accentuate fine pulmonary or osseous detail, but simultaneously increases noise.: Bone 6. Numerous formats are available to store images, including:: a. JPEG b. GIF c. PNG 7. Hodgkin lymphoma accounts for the majority of lymphomas.: Thymic 8. Carcinoid tumors arising in the thymus tend to be far more aggressive than their pulmonary counterparts, primarily as a result of high rates of local reoccurrence and:: Metastasis 9. Ectopic parathyroid tissue is a cause of anterior mediastinal mass.: Rare 10. The middle mediastinum is located between the anterior and posterior compartments and contains the: 1. heart 2. pericardium 3. trachea: 1, 2, & 3 11. are the most common tumors of the peripheral nerves.: Schwannomas 12. Because many pulmonary structures and abnormal findings are smaller than mm, imaging of the chest is preferably performed using high resolution CT (HRCT) technique.: 3 13. Lung is defined as increased attenuation of the lung that obscures the underlying architecture.: Consolidation 14. The incidence of PJP has diminished because of widespread prophylaxis in the United States and improved treatment for treatment.: HIV 15. , defined by irregular intralobular lines, nearly always indicates pul- monary fibrosis.: Reticulation 16. cancer remains the leading cause of cancer related death among men and women.: Lung 17. Lung carcinoma is traditionally divided into lung carcinomas and lung carcinoma based on histopathology, and this division along with stage direct therapy.: small cell; non-small cell 18. Calcification is present in about % of pulmonary artery sarcomas.: 25% 19. The ease with which these studies can be performed provides the potential for and radiation exposure.: overuse; inappropriate 20. CT can deposit more radiation dose per examination than other imaging modalities and accounts for % of the total collective medical effective dose delivered to the U.S. public: 50