Linked Life Data

17627420

Source:http://linkedlifedata.com/resource/pubmed/id/17627420

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2007-7-13
pubmed:abstractText
The aim of this work was to estimate tumor-absorbed doses delivered from the administration of fixed activities of (186)Re-HEDP for the treatment of bone metastases from prostate cancer. The variations and reproducibility in the estimated absorbed dose owing to the reconstruction algorithm used (OSEM vs. FBP) were also analysed. For this aim, correction methods for scatter and attenuation were kept identical, whereas the same calibration data and thresholding techniques were used to obtain quantification. This study was carried out in spinal and pelvic lesions of 7 patients. For comparison, the absorbed doses, based upon the maximum and the mean voxel count, were calculated, resulting in the absorbed dose (maximum): 60 Gy (sigma = 30 Gy) and 33 Gy (sigma = 15 Gy) for OSEM and FBP, respectively, and absorbed dose (mean): 26 Gy (sigma = 12 Gy) and 17 Gy (sigma = 7 Gy) with OSEM and FBP, respectively. We concluded that the administration of fixed activity resulted in a range of absorbed doses, and we showed that, despite using the same approach, the choice of the reconstruction algorithm can result in differences higher than 50% in the estimated tumor-absorbed doses. In conclusion, the need for a standardization of the methodology used for the calculations is emphasized by this work, especially when comparisons between patients and different centers are of interest.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1084-9785
pubmed:author
pubmed:issnType
Print
pubmed:volume
22
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
121-4
pubmed:dateRevised
2007-12-3
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Tumor dosimetry on SPECT (186)Re-HEDP scans: variations in the results from the reconstruction methods used.
pubmed:affiliation
Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sulton, Surrey, UK. antigoni.divoli@icr.ac.uk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Clinical Trial, Phase II, Research Support, N.I.H., Extramural