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Radiology

Colloquium VM606
by

Stephen Joslyn

on 24 March 2014

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Transcript of Radiology

Radiology
An Overview
Dr. Steve Joslyn
BVMS DipECVDI MRCVS
Technology
Opportunities
Academic (13)
Research Opportunities
Case Reports
Get going now!
What is it?
Becoming a radiologist
Anatomy &
Physiology
Radiology
Patho-
physiology
Physics &
Technology
AIR
FAT
BLOOD and ST
BONE
IODINE
BARIUM
AIR
FAT
BLOOD and Soft Tissue
BONE
Photoelectric interactions Predominate
Compton Scatter interactions Predominate
Pair-Production interactions Predominate
Mammography Photon E range
Diagnostic Photon E range
CT Photon E range
Photoelectric Effect: The energy of the incident x-ray photon is lost when it impacts an orbiting electron and ejects it. An outer electron will fill the void and release energy, as characteristic radiation, equal to the difference of the orbital energy (e.g. M - L in eV). With more interactions, the reducing energy of the characteristic radiation photon will be attenuated.
Compton Scatter: The increased energy of the incident x-ray photon is not all lost when it impacts and ejects an orbiting electron. The incident photon is merely scattered in a different direction, but continues on. Depending on which orbit the photon impacts will give rise to either Compton Scatter or Photoelectric effect, so both interactions can overlap.
Pair-production: The incident photon has enough energy to hit the nucleus and eject a pair of beta particles (positron and electron). A positron is the anti-matter equivalent of the electron with a positive charge. It is heavily attracted to electrons so when it finds one, and it will do very quickly), they both annihilate producing two photons of 0.511MeV each, which irradiate in exactly opposite directions to each other.
X-ray photon attenuation and the types of interaction with common tissue and medical contrast agents.
skeletal exposure
abdominal exposure
thoracic exposure
Large Animal, Small Animal, Exotics....
1 year Rotating internship
3 year Residency - ACVR, ECVDI, etc
Board Examinations
Clinical Experience in Small animal, or Large animal Practice
Come to the dark side!
Stereolithography
Private Practice (22)
Teleradiology (20)
Prospective Studies
Retrospective studies
Virtual Endoscopy
$$$
Caseload
Time
Species
$
Caseload
Time
Species
$$$
Caseload
Time
Species
Detection of pneumothorax and pleural effusion with horizontal beam radiography.
Lynch KC
Radiography
Medicine
Radiation
Oncology
DVM or equivalent
Computed tomographic imaging of dogs with primary laryngeal or tracheal airway obstruction.
Stadler K
Lung Lobe torsion - CT imaging technqiues
Vititoe K
Vertebral Heart Score in Cats
Pilton J
Digital Image Analysis
Stereolithography
Micro dose CT cardiac angiography in normal cats
Rodriguez K
1 publication = weeks(s) research/data collection; month(s) of writing
Enough time in 4th year?
If you put the effort in, Radiology will get you published.
Help in choosing a Veterinary Career?
Vet Student
Want a Life?
YES!
General Practice
Research
Want money?
No
Yes
NO!
Sanity
CRAZY
SANE
Attention Span
Non-existent
Significant
Behavior Medicine
Emergency Medicine
Hard Working?
Very
Whatever
Afraid of the Dark
OCD?
Afraid of the Sun
Yes
Cardiology
No
Radiology
Ophthalmology
Jock
Nerd
Dermatology
Orthopaedics
Attitude?
Nice
Doesn't Matter
MEAN
Patient Dead?
Yes
No
Pathology
Anaesthesia
Wannabe Surgeon
Wannabe Medic
Neurology
Soft Tissue Surgery
Medicine
Hipster
Not Sure
Exotics
Full transcript