Collimated field Study guides, Class notes & Summaries

HESI EXIT EXAM STUDY VERIFIED QUESTIONS AND ANSWERS 2023 LATEST UPDATE GRADED A A radiographer prepares to perform an AP projection of the distal femur on a patient with a suspected femoral fracture. Which represents the best approach for positioning both the patient and the x-ray tube? A. Rotate the leg 15 degrees medially; place the cathode end of the tube toward the foot. B. Rotate the leg 15 degrees medially; place the anode end of the tube toward the foot. C. Do not rotate the l...

which of the following describes how fluoroscopic images are acquired that study human anatomy and function? - single, static image exposures taken using low milliamperage (mA) -real-time acquisition -exposures timed with the patient's body position -mobile C-arm system Answer Real-time acquisition Which three of the following are necessary to generate fluoroscopy? -x-rays -image receptor -conversion of x-ray to visible light -patient Answer x-ray, image receptor, conversion of x-ray...

SPECT QC Energy Peak rmity Resolution Linearity Center of Rotation COR high - count extrinsic flood field uniformity correction Jaszczak Center of Rotation COR - NTRADY12 COR reduces spatial resolution & blurring Image contrast a measure Performed to ensure center field of view of camera detect or matches computer software High count extrensic flood - field uniformity correction Performed directly by manufacturer used to ensure efficiency photon decfection is constant across an surface of c...

X-ray interaction with matter produces the whites in the image: CORRECT ANSWERS: Photoelectric absorption X-ray interaction causing "fog" in an image: CORRECT ANSWERS: Compton scatter X-ray interaction occurs at high kVp in the diagnostic range: CORRECT ANSWERS: Compton scatter X-ray interaction decreased image contrast: CORRECT ANSWERS: Compton scatter Radiation bouncing erratically off patient: CORRECT ANSWERS: Scatter Radiation hitting image receptor: CORRECT ANSWERS: R...

Radiation protection: Test Questions & Answers 2023 1. Biologic material irradiated under hypoxic conditions is (A) more sensitive than when irradiated under oxygenated conditions (B) less sensitive than when irradiated under anoxic conditions (C) less sensitive than when irradiated under oxygenated conditions (D) unaffected by the presence or absence o oxygen - ANSWER-(C) less sensitive than when irradiated under oxygenated conditions 2. According to the National Counc...

PA Oblique Chest Patient Position : •Upright, standing or seated •Top of IR 1½ to 2 inches (3.8 to 5 cm) above vertebra prominens PA Oblique Chest Part Position : •45-degree left anterior oblique (LAO) or right anterior oblique (RAO) •Side of interest is farther from IR (elevated side) •Shoulders in same transverse plane •Arms positioned out of radiation field PA Oblique Chest CR Position : •Perpendicular to IR •Enters at level of T7 When is the exposure made for P...

Radiographer A radiologic technologist who administers ionizing radiation to perform radiographic procedures. They produce radiographic procedures at the request of a physician. Radiologic technology a health care profession that includes all diagnostic imaging technologists and radiation therapists. Radiographers must evaluate an image for _______ quality, _______, and _________ relative to the diagnosis or the reason for the procedure. technical, accuracy, appropriateness ALARA As Low A...

HESI EXIT EXAM STUDY VERIFIED QUESTIONS AND ANSWERS 2023 LATEST UPDATE GRADED A A radiographer prepares to perform an AP projection of the distal femur on a patient with a suspected femoral fracture. Which represents the best approach for positioning both the patient and the x-ray tube? A. Rotate the leg 15 degrees medially; place the cathode end of the tube toward the foot. B. Rotate the leg 15 degrees medially; place the anode end of the tube toward the foot. C. Do not rotate the l...

HESI EXIT EXAM STUDY VERIFIED QUESTIONS AND ANSWERS 2023 LATEST UPDATE GRADED A A radiographer prepares to perform an AP projection of the distal femur on a patient with a suspected femoral fracture. Which represents the best approach for positioning both the patient and the x-ray tube? A. Rotate the leg 15 degrees medially; place the cathode end of the tube toward the foot. B. Rotate the leg 15 degrees medially; place the anode end of the tube towar...

The Symbol R means: a. rem b. rad c. roentgen d. radiation - Answer c. roentgen The acronym rad means: a. radiation absorbed dose b. roentgen absorbed dose c. roentgen acquired dose d. radiation at death - Answer a. radiation absorbed dose The roentgen (R) exposure is measured in: a. tissue b. water c. a lab d. air - Answer d. air The symbol mR means: a. milliroentgen b. microroentgen c. megaroentgen d. millirem - Answer a. milliroentgen One roentgen or 1 R is...