Document Detail

Multislice CT of the pelvis: dose reduction with regard to image quality using 16-row CT.
MedLine Citation:
PMID:  15806366     Owner:  NLM     Status:  MEDLINE    
To optimize examination protocols of 16-row multi-detector CT (MDCT) of pelvis for dose reduction with regard to image quality. MDCT of pelvis was performed on 12 cadaver specimens with stepwise reduction of tube current from 160 mA (113, 80, 56, 40, 28) to 20 mA at 120 kV. Scan parameters were 16 x 1.5 mm collimation. Reconstructions of axial and coronal images were used for evaluation of cortex, trabeculum, image quality, image noise, acetabulum and iliosacral (ISJ) joints. After data were blinded, evaluation of images was done by three radiologists according to 5-point Likert scale. Accuracy of the observers in sorting films according to dose reduction was determined with kappa coefficient. Mean values of image evaluation were determined. Pronounced deterioration of image quality for all criteria was observed between 80 and 28 mA. Adequate image quality was obtained at 40 mA [effective dose (E): 2.2 mSv, CTDI(w): 2.8 mGy] for criterion detailed definition of acetabulum and ISJ and at 80 mA (E: 4.4 mSv, CTDI(w): 5.6 mGy) for remaining criteria. Moderate agreement was observed between the three observers (kappa coefficient: 0.31). All observers were excellent in arranging images according to decreasing dose. Using 16-row MDCT image quality of pelvis is acceptable at 80 mA and 120 kV. This translates into a dose reduction of 33% of average value of the nationwide survey of the German Roentgen Society (1999) for this type of examination.
Jessen Gurung; M Fawad Khan; Adel Maataoui; C Herzog; R Bux; H Bratzke; Hanns Ackermann; Thomas J Vogl
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Publication Detail:
Type:  Journal Article     Date:  2005-04-02
Journal Detail:
Title:  European radiology     Volume:  15     ISSN:  0938-7994     ISO Abbreviation:  Eur Radiol     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-08-10     Completed Date:  2005-12-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9114774     Medline TA:  Eur Radiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1898-905     Citation Subset:  IM    
Institute for Diagnostic and Interventional Radiology, Johann Wolfgang Goethe University, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany.
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MeSH Terms
Acetabulum / radiography
Aged, 80 and over
Clinical Protocols
Image Processing, Computer-Assisted / methods*
Middle Aged
Observer Variation
Pelvic Bones / radiography*
Radiation Dosage*
Radiographic Image Enhancement / methods*
Sacroiliac Joint / radiography
Single-Blind Method
Tomography, X-Ray Computed / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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