-
AAFD
THE UPDATES IN AAFD
Posted:
Apr 26 2013, 7:55 PM EDT by
-
Compensating Filters and Radiation Dose to the Patient
It is a given that the inherent latitude of the Digital systems enable us to visualise a far wider range of densities than Film/Screen technology.
However, the use of Compensating Filters also reduces Dose to the Patient by absorbing the excess radiation before it reaches the less dense regions of the subject. In so doing scatter is reduced resulting also in a reduction in "noise" and, therefore, improved image quality.
From the Film/Screen days Optimum kV was also employed to modify the Latitude of the "Radiation Image", before it impinged upon the receptor, enabling the sensitometric response of the receptor to depict the range of structural densities of the subject in the processed image.
With Intensifying Screens of calcium tungstate, then later the Rare Earths such as terbium activated gadolinium oxysulfide, the kV response was pretty much linnear through out the medical diagnostic X-Ray spectrum from 40 to 150kV. I believe this is no longer the case and that there is a peak sensitivity of the phosphors used in digital systems at around 60 to 80kV, requiring more exposure outside this range to achieve the same Exposure Index, (or equivalent).
This seems to be of proprietary value to the various manufacturers so not that easy to confirm.
It does raise the point that an exposure chart management policy recommending raising chart kVs across the board may be misplaced and counter to ALARA.
Regards
Gary Allbutt
Posted:
Mar 24 2012, 12:37 AM EDT by Gajaal
-
Foot Radiographic Anatomy
This page contains radiographic anatomy of the adult foot Images on this page DP view Oblique Lateral Weight Bearing view Adult Foot - DP View Adult Foot - Oblique View
Last updated:
Aug 15 2011, 7:28 AM EDT by
-
Lisfranc's Fracture
under construction Introduction The Lisfranc fracture usually appears in lists of commonly missed fractures (up to 20% of Lisfranc injuries are overlooked on initial radiographs). Prognosis can be poor in cases of delayed treatment. A miss
Last updated:
Jan 6 2011, 7:24 AM EST by
-
Lower Limb - Foot - Joints
Foot - Joints Tarsal Joints (intertarsal) Foot - Intertarsal joints Talocalcaneal (subtalar) joint Is a plane synovial joint (part of the talocalcaneonavicular joint), and is formed between the talus and calcaneu
Last updated:
Jul 22 2010, 10:04 AM EDT by AndyC
-
Lower Limb - Bones - Ankle and Foot
Bones of the Ankle and Foot Tarsus Tarsus Consists of seven tarsal bones: talus , calcaneus , navicular bone , cuboid bone , and three cuneiform bones . 1. Talus Transmits the weight of the body from t
Last updated:
Jul 15 2010, 9:09 AM EDT by AndyC
-
Foot Abnormality.
Hi everybody. Having trouble identifying the abnormality within this projection.
http://yfrog.com/0rhalluxcrushlatoblj
The 4th metatarsal doesn't look right, but i have no idea what you would call it. Any help would be great. Thanks.
Posted:
Oct 22 2009, 12:04 PM EDT by
-
Exposure - Foot
This page contains radiographic exposure values Adult Foot Region View kVp mAs Cassette Grid Distance Foot DP 55 3.2 Detail No 100 - 115cm (40 inches) Medial Oblique 57 3.2 Detail No
Last updated:
Jun 7 2011, 2:39 AM EDT by AndyC
-
Protocol - Foot
General X-ray protocols Foot Trauma Protocol Foot - DP Foot - Medial Oblique Supplementary views Foot - Lateral Non Trauma Protocol Foot - DP Foot - Medial Oblique Supplementary view
Last updated:
Apr 12 2011, 7:40 AM EDT by AndyC
-
Foot - DP
video positioning - Foot DP view
Added:
Feb 20 2009, 9:25 AM EST by
-
Foot - Medial Oblique
video positioning - Foot Medial Oblique view
Added:
Feb 20 2009, 9:26 AM EST by
-
Foot - Lateral
video positioning - Foot Lateral view
Added:
Feb 20 2009, 9:27 AM EST by
-
Lateral Toe Radiography
Introduction There are three important considerations that impact on toe radiography Lateral toe radiography is nothing if not tedious. The doctor's request will often ask for "foot". Toes are not considered important
Last updated:
Feb 1 2010, 11:38 PM EST by
-
 AP Foot
Albums:
Uncategorized
Added:
Dec 6 2008, 8:07 PM EST by
-
Podiatry X-ray Views
Podiatry Foot & Ankle X-Rays are a particular subset of radiography that throw up a few unique challenges. The positions themselves are relatively normal and easy to achieve, however it is the condition of the patient that can make these examination
Last updated:
Feb 8 2010, 3:11 AM EST by AndyC
-
Gray-Tech Graded aluminium filters
Gray-Tech Filters Pty Ltd is now located at 28 Snowwood Street, Reedy Creek Queensland and can be contacted on (07) 55936809 or by facsimile on (07) 55934186
Posted:
Jul 3 2008, 3:17 AM EDT by Anonymous
-
Sesamoids - Axial
Radiographic Positioning Adult Other related pages of interest Applied Radiography Radiographic Anatomy Radiographic Protocols Name of projection Foot - Axial - Sesamoids Area Co
Last updated:
Jun 17 2011, 4:17 PM EDT by AndyC
-
Foot - Lateral
Radiographic Positioning Adult Other related pages of interest Applied Radiography Radiographic Anatomy Radiographic Protocols Name of projection Foot - Lateral (
Last updated:
Jun 18 2011, 4:26 PM EDT by AndyC
-
Foot - Medial Oblique
Radiographic Positioning Adult Other related pages of interest Applied Radiography Radiographic Anatomy Radiographic Protocols Name of projection Foot - Oblique (Medial Ro
Last updated:
Jun 18 2011, 4:26 PM EDT by AndyC
-
Foot - DP
Radiographic Positioning Adult Foot - Dorsiplantar Projection Other related pages of interest Applied Radiography Radiographic Anatomy Radiographic Protocols Name of Projection Foot -
Last updated:
Jun 18 2011, 4:28 PM EDT by AndyC
|
|
