Helical ct scan - Study guides, Class notes & Summaries

CT Registry Review (MIC) Questions and Answers Rated 100% In order for an x-ray photon to be measured it must: 1. enter the detector chamber 2. be absorbed by the detector material 3. be converted to a measurable event *ANS* 1,2,3 Which system component converts the projection attenuation data into the proper digital form for the array processor? *ANS* analog-to-digital converter Which of the following is NOT a function of a PACS system? a. reconstruction of the image from the raw d...

Regarding the diagnosis of acute appendicitis, all the following are true EXCEPT: A. Vital signs are usually abnormal, even early in the course of acute appendicitis. B. Rebound is usually elicited only after the appendix has ruptured or infarcted. C. Rovsing's sign is pain in the right lower quadrant upon palpation of the left lower quadrant. D. The obturator sign is pain upon flexion and internal rotation of the hip. E. The psoas sign is pain upon extension of the hip. - A. Vital signs ...

CT registry- image production Exam Questions and Answers 100% Pass Fundamental principle of ct may be summarized as - Correct Answer ️️ -An image of an object may be reconstructed on the basis of the attenuation that occurs as x radiation is transmitted through it Detectors measure - Correct Answer ️️ -The radiation that is transmitted through the pt. An image is reconstructed in the basis of the magnitude of X-ray attenuation that occurs at spatially distributed points within the...

data acquisition correct answers the measurement of the attenuation that occurs along each path through the patient from the x-ray tube to the detector data reconstruction correct answers computerized processing of the transmission measurements into the CT image multidimensional image display correct answers display of the reconstructed grayscale image in two-dimensional and / or 3-D format ; representation of the attenuation that occurred across the scanned volume of tissue image archi...

SAEM Practice 2020/ 508 Questions with Verified Answers & Rationales/ . Terms like: A 46 year old woman presents to the emergency department complaining of abrupt onset of intermittent severe pain in the left flank and abdomen that woke her from sleep. She is pacing around the stretcher and appears extremely uncomfortable. She has never experienced this type of pain previously and denies fevers or other symptoms. Renal calculus is suspected. Which of the following is true regarding the diagn...

CT registry- image production Exam Questions and Answers 100% Pass Fundamental principle of ct may be summarized as - Correct Answer ️️ -An image of an object may be reconstructed on the basis of the attenuation that occurs as x radiation is transmitted through it Detectors measure - Correct Answer ️️ -The radiation that is transmitted through the pt. An image is reconstructed in the basis of the magnitude of X-ray attenuation that occurs at spatially distributed points within the...

Which of the following postprocessing techniques uses 100% of the data set? A) Multiplanar reconstruction B) Shaded surface rendering C) Maximum intensity projections D) Volume rendering - ️️VR Which of the following statements regarding retrospective ECG gating is true? A) It results in lower patient dose than prospective ECG gating. B) It uses a continuous helical acquisition throughout the ECG-monitored scan range. C) It is more prone to motion artifacts and image misregistration. ...

Which CT system is capable of helical scanning? correct answers volume CT scanners 1. 3rd generation (960) detectors 2. 4th generation 3. EBCT - electronic beam CT Which generation of CT scanner utilized a (360) degree rotation of the x-ray tube around the patient? correct answers 3rd generation scanner Which generation of CT scanner utilizes a fixed ring of detectors? correct answers 4th generation (4800) detectors What are the advantages of CT over conventional imaging? correct ans...

Which scanners produce a higher mA setting, with shorter tube rotation times (of 0.5 seconds)? - ️️64 slice helical scanners Who might require More Contrast and Faster Injection Rates (up to 6 to 8 mL/sec)? - ️️Larger patients; in order to achieve a diagnostic study Why are both AP and Lateral Scouts useful in scanning the spine? - ️️Help establish smallest possible DFOV Why are pts instructed to extend arms overhead in CT scans of Chest/Abd? - ️️Prevent beam hardening artifa...

The phantom pictured below contains only water. Based on the ROI readings what problem should be reported to the medical physicist? correct answers Unacceptable uniformity What artifact is visible in the image below in the posterior portion of the patient's abdomen? correct answers Beam hardening artifact What two computed tomography (CT) artifacts are demonstrated in the following image? (Select two) correct answers Beam hardening artifact Ring artifact A technologist review a patien...