Continuously moving table MRI with sliding multislice for rectal cancer staging: Image quality and lesion detection
| Autor: | Ute Ludwig, Mathias Langer, Tobias Baumann, Oliver Schaefer, Elmar Kotter, Hans-Peter Fautz, Gregor Pache |
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| Rok vydání: | 2010 |
| Předmět: |
Adult
Male medicine.medical_specialty Image quality Contrast Media Sensitivity and Specificity Statistics Nonparametric Metastasis Meglumine Organometallic Compounds medicine Humans Radiology Nuclear Medicine and imaging Multislice Neoplasm Metastasis Lymph node Pelvis Aged Neoplasm Staging Retrospective Studies Aged 80 and over medicine.diagnostic_test Rectal Neoplasms business.industry Magnetic resonance imaging General Medicine Middle Aged medicine.disease Magnetic Resonance Imaging medicine.anatomical_structure Abdomen Female Radiology Neoplasm Recurrence Local business medicine.drug |
| Zdroj: | European Journal of Radiology. 73:579-587 |
| ISSN: | 0720-048X |
| DOI: | 10.1016/j.ejrad.2008.12.008 |
| Popis: | Purpose To determine image quality and lesion detection of sliding multislice (SMS), a recently developed moving table MRI technique, in patients with rectal cancer. Materials and methods Twenty-seven paired SMS (Avanto, Siemens Medical Solutions) and MDCT (Sensation 64, Siemens Medical Solutions) examinations of abdomen and pelvis were performed in patients with rectal cancer and compared for detection of liver, lymph node and bone metastases by two independent observers. A contrast-enhanced, fat saturated 2D gradient echo sequence (TE, 2.0 ms; TR, 102 ms; slice, 5 mm) was acquired with SMS and a standard contrast-enhanced protocol (100 ml @ 2.5 ml/s; slice, 5 mm) was used for abdominal MDCT. Standard of reference consisted of a consensus evaluation of SMS, MDCT, and all available follow-up examinations after a period of 6 months. Artifact burden and image quality of SMS was assessed in comparison to stationary gradient echo sequences obtained in an age-matched group of 27 patients. Results Whereas SMS achieved a mean quality score of 3.65 (scale, 0–4) for the liver, representing very good diagnostic properties, strong breathing artifacts in the intestinal region were observed in 19 cases by both observers. The retroperitoneum still achieved a mean quality score of 3.52, although breathing artifacts were noted in 12 and 15 cases (observers 1 and 2, respectively). The sensitivities of SMS to detect hepatic metastases were 91.2% and 94.1% for both observers, respectively, compared to 98.5%/98.5% for MDCT. The sensitivities for lymph node metastases were 87.5%/81.3% for SMS compared to 78.1%/81.3% for MDCT. The sensitivities for bone metastases were 91.7%/100% for SMS compared to 8.3%/16.7% for MDCT. Conclusion With slightly reduced image quality in the intestinal region, SMS exhibits equal detection of lymph node and liver metastases compared to MDCT. SMS MRI proved to be superior to MDCT in detection of bone metastases. |
| Databáze: | OpenAIRE |
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