Computed Tomography

Below are the ARRT category specifications for exam coverage.

ARRT Computed Tomography exam categories

165 Total Questions
1. Patient Interactions and Management
A. Patient Assessment and Preparation
1. clinical history
2. scheduling and screening
3. education
4. consent
5. immobilization
6. monitoring
a. level of consciousness
b. vital signs
c. heart rhythm and cardiac cycle
d. oximetry
7. management of accessory medical devices
a. oxygen delivery systems
b. chest tubes
c. in-dwelling catheters
8. lab values
a. renal function (*e.g., BUN, eGFR, creatinine)
b. other (e.g., d-dimer, LFT, INR)
9. medications and dosage
a. current
b. pre-procedure medications (e.g., steroid, anti-anxiety)
c. post-procedure instructions (e.g., diabetic patient)
B. Contrast Administration
1. contrast media
a. ionic, nonionic
b. osmolarity
c. barium sulfate
d. water soluble (iodinated)
e. air
f. water
g. other
2. special contrast considerations
a. contraindications
b. indications
c. pregnancy
d. lactation
e. dialysis patients
3. administration route and dose calculations
a. IV
b. Oral
c. rectal
d. intrathecal
e. catheters (e.g., peripheral line,central line, PICC line)
f. other (e.g., stoma, intra-articular)
4. venipuncture
a. site selection
b. aseptic and sterile technique
c. documentation (e.g., site, amount,gauge, concentration, rate, and number of attempts)
5. injection techniques
a. safety
b. manual
c. power injector options
1. single or dual head
2. single phase
3. multi-phase
4. flow rate
5. timing bolus
6. bolus tracking
6. post-procedure care
a. treatment of contrast extravasation
b. documentation
7. adverse reactions
a. recognition and assessment
b. treatment
c. documentation
1. Radiation Safety and Dose
A. Radiation Physics
1. radiation interaction with matter
2. acquisition (geometry)
3. physical principles (attenuation)
B. Radiation Protection
1. minimizing patient exposure
a. kVp
b. mAs
c. pitch
d. collimation/beam width
e. multi-detector configuration
f. gating
2. personnel protection
a. controlled access
b. education
3. shielding
a. traditional (e.g., lead apron)
b. non-traditional (e.g., bismuth)
4. dose measurement
a. CT dose index (CTDI)
b. dose length product (DLP)
c. documentation
5. patient dose reduction and optimization
a. pediatric
b. adult
c. dose modulation techniques(e.g., SMART mA, auto mA, CARE dose, and SURE exposure)
d. iterative reconstruction
e. dose notification
f. dose alert
1. Image Formation
A. CT System Principles, Operation, and Components
1. tube
a. x-ray production
b. warm-up procedures
2. collimation/beam width
3. generator
4. detectors
a. detector configuration
b. detector collimation
5. data acquisition system (DAS)
6. computer and array processor
B. Imaging Parameters and Data Acquisition
1. parameters
a. kVp
b. mAs
c. pitch
d. acquisition thickness
e. x, y, z planes
f. scan field of view (SFOV)
2. acquisition
a. axial/sequential
b. helical/spiral
c. volumetric
C. Image Processing
1. reconstruction
a. filtered backprojection reconstruction
b. iterative reconstruction
c. interpolation
d. reconstruction algorithm
e. raw data versus image data
f. prospective/retrospective reconstruction
g. reconstruction thickness
h. reconstruction interval
2. post-processing
a. multi-planar reformation (MPR)
b. 3D rendering (MIP, SSD, VR)
c. quantitative analysis (e.g., distance, diameter, calcium scoring, ejection fraction)
2. Image Evaluation and Archiving
A. Image Display
1. pixel, voxel
2. matrix
3. image magnification
4. display field of view (DFOV)
5. window level, window width
6. cine
7. geometric distance or region of int erest (ROI) (e.g., mean, standard deviation [SD])
B. Image Quality
1. spatial resolution
2. contrast resolution
3. temporal resolution
4. noise and uniformity
5. quality assurance and accreditation
6. CT number (Hounsfield units)
7. linearity
C. Artifact Recognition and Reduction
1. beam hardening or cupping
2. partial volume averaging
3. motion
4. metallic
5. edge gradient
6. patient positioning (out-of-field)
7. equipment induced
a. rings
b. streaks
c. tube arcing
d. cone beam
e. capping
D. Informatics
1. hard/electronic copy (e.g., DICOM file format)
2. archive
3. PACS and electronic medical record (EMR)
4. security and confidentiality
5. networking
1. Head, Spine, and Musculoskeleta
A. Head
1. temporal bones/internal auditory canal (IAC)
2. pituitary fossa
3. orbits
4. sinuses
5. maxillofacial and/or mandible
6. temporomandibular joint (TMJ)
7. base of skull
8. brain
9. cranium
10. brain perfusion
B. Spine
1. cervical
2. thoracic
3. lumbar
4. sacrum/coccyx
5. post myelography
6. discography
C. Musculoskeletal
1. upper extremity
2. lower extremity
3. bony pelvis and/or hips
4. shoulder and/or scapula
5. sternum and/or ribs
6. arthrography
2. Neck and Chest
A. Neck
1. larynx
2. soft tissue neck
B. Chest
1. mediastinum
2. lung
3. heart
4. airway
5. low dose lung screening
3. Abdomen and Pelvis
A. Abdomen
1. liver
2. biliary
3. spleen
4. pancreas
5. adrenals
6. kidneys and/or ureters
7. GI tract
B. Pelvis
1. bladder
2. colorectal
3. reproductive organs

Computed Tomography Exam

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