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COVID-19 Guidance: Guidance and operational updates for Cummings School and its veterinary teaching hospitals

Courses in Diagnostic Imaging – CT and MRI


  • Instrumentation, Digital images, Resolution, Signal/Noise
  • Magnetism
  • Larmor frequency
  • Faraday’s Law
  • T1, T2, T2* relaxation
  • Spin echo techniques-T1, T2 and intermediate-weighted pulse sequences
  • Gradient echo, T2* weighted sequences
  • Inversion recovery-STIR, FLAIR images
  • Fat Saturation
  • MRA
  • Contrast enhancement- with T1-weighting and T2*-weighting
  • Clinical case presentations


  • Attend 2 hour physics lecture by AST
  • Read CT physics chapter in Christensen or other textbook (eg, Berland)
  • Be able to describe cause of these CT artifacts-beam hardening, partial volume averaging, blooming artifact, edge gradient artifact, noise or photon starvation
  • Be able to describe in own words the concept of windowing. Know approximate window settings for brain, lung, mediastinum, nasal cavity, bone
  • Complete physics practice exam (in binder) and return to AST
  • Learn CT scanner operation-be able to run a scan completely by yourself (on emergency basis if needed)
  • Attend all clinical CT scans on CT day
  • Learn terminology and orientation of animal vs. human images (use CD-ROM and binder notes)
  • Learn CT skull anatomy landmarks (test yourself using CD-ROM and binder notes)
  • Learn major brain divisions on gross specimens (use CD-ROM and binder notes)
  • Learn ventricular system-gross and CT (use CD-ROM and binder notes)
  • Learn cranial nerves (use CD-ROM)
  • Learn CT anatomy of entire head (use annotated hard copy of normal dog)
  • Know HU for major tissue types (binder notes)
  • Know terminology for types of hydrocephalus (see newsletter in binder)
  • Be able to explain in own words concept of contrast enhancement
  • Know the three factors which cause a lesion to be hyperdense on pre-contrast CT
  • Learn image characteristics for various lesions (see glossary in binder, Kornegay article, human texts)
  • Be able to dictate report with all the necessary ingredients (see memo)
  • Learn basic anatomy of spinal canal (with myelography) thorax and adrenal gland region
  • Practice CT biopsy with phantom (see articles)
  • Read all CT articles in resident reading list/files
  • Complete the self-exam in CD-ROM