Tomodensitometry
This procedure totally changed the diagnosis of cancer.
There are many websites on CT-scan for students to learn CT-scanner.
The Virtual
Human Body project allows very interesting comparisons between CT slicles
and anatomical slices (constituted with the bodies from consenting death sentenced
man and woman).
We liked to thank the authors of the radiology websites who allowed me to select
a few illustrative views.
Let us list a few of them:
-
Iconocerf website (Rennes France) , elaborated the French College of
Radiologists, with many explanations about pathologies (in French and English),
- Mc
Gill University (Montréal) website , with many well documented views
of thorax pathology,
- Cleveland
University website, with many well documented clinical cases,
- Harvard
Brigham Hospital University Radiology Unit website, with many other
well documented clinical cases,
- SRS Educational Resource
(website from the Scottish Radiology Society)
- European
Association of Radiology E-learning Initiative, with very well documented
views (16,000) of various pathologies (2,000 cases).
And many other websites.
All these sites show other pathologies than cancer: a very important
point of view since many other pathologies may give images very similar to cancer.
When remembering the first CT-scans, incredible progress has been made with
recently helical scanners and multislices devices. The
greaster image definition, the shot speed preventing respiration (and other)
motion artefacts, the reduced patient irradiation make them unavoidable diagnostic
tools (although the profusion of images may become nowadays excessive).
A few definitions about planes in tomodensitometry:
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Transverse plane (or axial
plane): is a horizontal plane perpendicular to the standing human
body, dividing it into upper and lower parts. This is the original reconstruction
plane for tomodensitometry.
Sagittal plane: a vertical plane, running
from front to back, dividing the body into right and left sides. When
division occurs in the middle of the body, this plane is called median
plane.
Frontal plane (or coronal plane):
is a vertical plane running from side to side and dividing the body into
anterior and posterior parts.
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We have gathered some characteriscal views, adding to them a small diagram
and a comment in order to facilitate the e-learning:
