Property | Value |
Name | Designing a reference phantom to calibrate DEXA and QCT scanners |
Description | Research article:- Bansal S. C.1,2 , Goswami N.1, Rai D. V.2,3, Sen R.4, Khandelwal N.1 1.Department of Radio-diagnosis and Imaging, PGIMER, Chandigarh, India. 2.Department of Biophysics, Panjab University, Chandigarh,India. 3.Department of Biomedical Engineering, Shobhit University, Meerut, U. P.,India. 4.Department of orthopedics, PGIMER, Chandigarh, India.
Abstract:- Objective:To design a reference phantom for both QCT and DEXA scanners to check their cross calibration and equipment stability as a part of daily quality control program. Materials and Methods: The specially designed phantom simulating lumbar spine consisting of three sections of femoral head (excised from patients who suffered from fracture neck of femur and underwent hip replacement) was scanned for Bone Mineral Density study both with Quantitative computed tomography (Light Speed plus CT Scanner of GE) and Dual energy X-ray absorptiometry (Norland XR46) scanner simultaneously for a period of 30 days and the results were analyzed. Results: During this study the mean BMD reading in QCT was 153.287 (mg/cc) with Std. Deviation of 2.2708 and coefficient of variation 1.48% whereas, the mean BMD reading in DEXA was 0.516 (g/cm2) with Std. Deviation of 0.0026 and coefficient of variation 0.50 . Both Std. Deviation and coefficient of variation in QCT and DEXA are within acceptable limits. Conclusion: Consistency in BMD readings of both QCT and DEXA scanners confirmed that this type of single phantom which is simple in design could be easily used to check the cross calibration and equipment stability as a part of daily quality control program. It has proved very simple, easy to perform and cost effective reference phantom for checking precision and accuracy in BMD measurements prior to examining a patient.
Key words:- BMD, calibration, DEXA, QCT, phantom. |
Filename | Bansal S C et. al..pdf |
Filesize | 296.28 kB |
Filetype | pdf (Mime Type: application/pdf) |
Creator | admin |
Created On: | 08/16/2011 00:00 |
Viewers | Everybody |
Maintained by | Editor |
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Last updated on | 09/10/2011 08:22 |
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