IC DR Calculators

Calculators

Only for use in Diagnostic Physics exams

For the convenience of our candidates, an emulated version of the TI-30XS calculator will be available in the Pearson VUE examination interface. To familiarize yourself with its operation and the Pearson VUE testing interface, please visit: http://www.pearsonvue.com/ABR/ and click the link for the “Computer-Based Testing Tutorial” on the “Downloads” section.

Please note that the calculator provided during the exam is a software program designed to emulate the handheld TI-30XS, not the actual handheld device itself.

As has always been the case, absolutely no personal electronic, computing, or calculator devices are permitted in the examination areas. Although the calculator provided will be a software program, it may be helpful to obtain the actual device prior to the test and practice with it, as the calculator in the exam will look and function very similarly to the handheld model

Sample Problems:

1. A radiographic room has a source image distance of 100 cm. An object is 10 cm from the receptor. What is the magnification of the object:

A) 0.75
B) 1.0
C) 1.1
D) 1.4
E) 2.0

Answer: C
Magnification = Source Receptor Distance/ (Source Receptor Distance - Object Receptor Distance)Magnification = 100/ (100 -10) = 1.11

2. A CT scan has a 512 x 512 matrix with 2 bytes per pixel. How much storage is required to store 128 of these CT images?

A) 32 MB
B) 64 MB
C) 128 MB
D) 256 MB
E) 512 MB

Answer: B
Number of Bytes = 512 x 512 x 2 x 128 = 67108864
Number of MB = Number of Bytes/ (1024 x 1024) = 64 MB

3. The field of view of a gamma camera is 36 cm. If a 128 x 128 matrix is used to for imaging, what will the width of a pixel be?

A) 1.3 mm
B) 1.8 mm
C) 2.1 mm
D) 2.8 mm

Answer: D
Pixel size = Field of View / Number of pixels across Field of View = 360 mm/128 = 2.81 mm