On replacing the manual measurement of ACR phantom images performed by MRI technologists with an automated measurement approach
| Autor: | Robert V. Mulkern, Lisa Bussolari, Vera Kimbrell, Lawrence P. Panych, Jr-Yuan George Chiou, Lei Qin |
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| Rok vydání: | 2015 |
| Předmět: |
medicine.medical_specialty
medicine.diagnostic_test business.industry Computer science Limits of agreement Magnetic resonance imaging equipment and supplies Positive correlation Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Software Signal-to-noise ratio (imaging) 030220 oncology & carcinogenesis medicine Radiology Nuclear Medicine and imaging Medical physics business Quality assurance Reference standards |
| Zdroj: | Journal of Magnetic Resonance Imaging. 43:843-852 |
| ISSN: | 1053-1807 |
| DOI: | 10.1002/jmri.25052 |
| Popis: | Purpose To assess whether measurements on American College of Radiology (ACR) phantom images performed by magnetic resonance imaging (MRI) technologists as part of a weekly quality control (QC) program could be performed exclusively using an automated system without compromising the integrity of the QC program. Materials and Methods ACR phantom images are acquired on 15 MRI scanners at a number of ACR-accredited sites to fulfill requirements of a weekly QC program. MRI technologists routinely perform several measurements on these images. Software routines are also used to perform the measurements. A set of geometry measurements made by technologists over a five week period and those made using software routines were compared to reference-standard measurements made by two MRI physicists. Results The geometry measurements performed by software routines had a very high positive correlation (0.92) with the reference-standard measurements. Technologist measurements also had a high positive correlation (0.63), although the correlation was less than for the automated measurements. Bland–Altman analysis revealed overall good agreement between the automated and reference-standard measurements, with the 95% limits of agreement being within ±0.62 mm. Agreement between the technologist and the reference-standard measurements was demonstratively poorer, with 95% limits of agreement being ±1.46 mm. Some of the technologist measurements differed from the reference standard by as much as 2 mm. Conclusion The technologists' geometry measurements may be able to be replaced by automated measurement without compromising the weekly QC program required by the ACR. J. Magn. Reson. Imaging 2015. |
| Databáze: | OpenAIRE |
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