Homework on “Introduction to Medical Imaging” PROBLEM 1. Select the components that are needed in different imaging modality. Select all and only the required components. X-ray CT PET MRI Ultrasounds a) Transducer b) static magnet c) A/D converter d) Amplifier e) Computer f) Rotating gantry g) Photomultiplier tube h) Time delayer i) x-ray tube j) Cyclotron k) Gradient coils l) IV injector m) Phased array transducer n) Collimator o) RF coils p) Laser q) Motorized patient
platform
r) Radio tracers s) Display (monitor) t) Crogen (coolant) PROBLEM 2. Matching imaging modality corresponding to each of the images (a)-(d) below. (1) MRI (2) X-ray CT (3) PET (4) B-mode Ultrasound (a) (b) (c) (d) Problem 3. Match the imaging modality, energy source, and typical operation frequency. Draw
straight lines to connect energy source and frequency items to each imaging modality.
1) CT 2) MRI 3) Ultrasound Imaging (4) Nuclear medicine imaging Energy sources:
(a) Lasers (b) Gamma rays (c) RF signals (d) X-rays (e) Acoustic waves Typical operation frequencies:
(f) 300 THz (g) 10 EHz (h) 2 MHz (j) 64 MHz (k) 200 EHz Note: KHz =103 Hz; MHz= 106 Hz; GHz = 109 Hz;
THz= tera Hz =1012 Hz; PHz = pera Hz=1015 Hz; EHz = exa Hz=1018 Hz; Problem 4: Select all appropriate statements about the medical imaging modality
1) CT 2) MRI 3) Ultrasound Imaging Statements:
(a)
(b)
(c)
(d)
(e)
(f) Most affordable
Potential ionizing radiation side effects
Can be portable
Provide excellent soft tissue information
Most useful for imaging anatomy of bony structures
Most sensitive molecular imaging modality (4) Nuclear medicine imaging

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