PURPOSE: The lack of electron density information in magnetic resonance images (MRI) poses a major challenge for MRI-based radiotherapy treatment planning (RTP). In this study the authors convert MRI intensity values into Hounsfield units (HUs) in the male pelvis and thus enable accurate MRI-base...
Anatomic relation- ship between the vaginal apex and the bony archi- tecture of the pelvis: A magnetic resonance imaging evaluation. Am J Obstet Gynecol 2005;192:1544- 8.Gutman RE,Pannu HK,Cundiff GW. Anatomic relationship between the vaginal apex and the bony architecture of the pelvis:a ...
Purpose The present study was aimed at verifying the automatic registration of the Focal (Elekta) platform with a dedicated phantom. Materials and methods A phantom that simulates the pelvis region in a stylised way and finalised to the registration of computed tomography–magnetic resonance images ...
Diabetic patients are particularly susceptible to developing foot ulcers from cumulative mechanical trauma, and immobile patients are prone to pressure ulcers about the pelvis, heels, and other high-risk areas. Skin ulcers compromise the natural defense of the integumentary system and lead to local esc...
pelvis since the early 1990s. MRI is supe- rior to CT in examinations of the true pelvis where 2.2 CT Scanning Technique 29 2.2.1 Spiral CT 29 CT is susceptible to beam-hardening artifacts due to 2.2.2 Multislice CT 30 adjacent bony structures which degrade image qual- 2.2.2.1 4-Slice...
This technology was clinically validated in the pelvis, cervical spine and sacroiliac joints [12], [13], [14], [15]. The purpose of this study is to test the equivalency of MRI-based synthetic CT (sCT) to conventional CT in quantitatively assessing bony morphology of the lumbar spine....
The largest inaccuracies of the sCT were observed at the bone boundaries in pelvis and spine, possibly due to the slightly blurred appearance of the sCT and inaccuracies in MRI to CT registration. The atlas-based method shows relatively large discrepancies in the bony structures mostly due to ...
since the CT radiation dose to the pelvis is approximately 5mSv to 7mSv per exam.40 On the 3D volume rendered images, the femoral head lateral extrusion (more than 18%) and acetabular under coverages are nicely demonstrated. On the cut-out view, one can show the anterior, posterior, or...
For example, in the pelvis, daily re-optimisation in bladder cancer radiotherapy based on anatomy of the day is superior to both PTV with population derived margins, i.e., no adaptation, and to ‘plan of the day’ approach. This is achieved with a decrease in PTV size and subsequent ...
If you are planning on using the democratiz3D service to automatically convert a medical scan to a 3D printable STL model, or you just happen to be working with medical scans for another reason, it is important to know if you are working with a CT (Compu