Physics MCQs for the half 1 FRCR is a complete and sensible revision device for the hot layout half 1 FRCR exam, masking the whole physics curriculum. Key positive aspects: • includes three hundred questions that replicate the fashion and trouble of the genuine examination • Covers uncomplicated physics, radiation laws and all of the imaging modalities incorporated within the Royal university of Radiologists education curriculum and new FRCR exam • comprises new examination issues resembling MRI and ultrasound imaging • solutions are observed by way of transparent, particular reasons giving applicants in-depth realizing of the subject • a lot of the query fabric is predicated at the Radiology-Integrated education Initiative (RITI), as instructed through the Royal university of Radiologists essential revision source for all half 1 FRCR applicants, Physics MCQs for the half 1 FRCR is written by way of a group of professional registrars who've lately effectively handed the half 1 FRCR examination and a well known scientific physicist
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A slit camera consists of a metal plate with a slit positioned between the tube and the image receptor. One dimension of the focal spot can be calculated from magnification of the slit image. This is then repeated for the other dimension with the slit perpendicular to its original position. b. True. This involves a test object with markings at a set distance apart with which an image is produced of a certain magnification. The degree of blurring of the markings in the image can be used to estimate focal spot size, as it is greater with a larger focal spot.
Increasing mAs increases the exit dose and ESD proportionately d. Increasing the tube kV increases the ratio of ESD to the exit dose e. Increasing filtration reduces the ratio of ESD to the exit dose 31 Chapter 3 – Imaging with X-rays – Questions 23. Patient dose in radiography can be reduced by: a. Increasing the focus-to-film distance b. Compression c. Collimation d. Using a secondary radiation grid e. Using the air-gap technique 24. The amount of scattered radiation leaving the patient is decreased by: a.
Abdominal radiograph ¼ 2 mGy c. A lumbar spine anterior–posterior (AP) radiograph is greater than a pelvis AP radiograph 45 Chapter 4 – Film-screen radiography – Questions d. Imaging the vertebral column typically requires a greater dose for the AP view compared with the lateral (LAT) view e. A LAT view of the skull is greater than a PA view 29. Factors that reduce the dose to the patient include: a. Increased filtration b. Reduced collimation c. Using a grid with paediatric patients d. Using an intensifying screen e.