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Evaluation of a respiratory navigator-gating technique in Gd-EOB-DTPA-enhanced magnetic resonance imaging for the assessment of liver tumors
- Source :
- European Journal of Radiology. 85:1232-1237
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- Objectives We investigated the clinical usefulness of respiratory navigator-gating technique for the assessment of liver tumors in Gd-EOB-DTPA-enhanced magnetic resonance (MR) imaging. Methods Eighty patients who underwent Gd-EOB-DTPA-enhanced MR imaging to evaluate known or suspected liver tumors were enrolled. Three-dimensional spoiled gradient-recalled echo images of the liver were acquired in the hepatobiliary phase by the following three methods: breath-hold imaging, navigator-gated low-resolution imaging, and navigator-gated high-resolution imaging. Navigator-gated imaging was performed during free breathing. Spatial resolution was identical between breath-hold imaging and gated low-resolution imaging. Signal intensities in the liver, muscle, and spleen were measured in 20 patients. Image quality was visually evaluated in all 80 patients. The detection rate and lesion conspicuity were assessed for 71 malignant liver lesions identified in 29 patients. Results The liver-to-muscle and liver-to-spleen signal ratios were significantly lower for gated images compared to breath-hold images. Images of acceptable quality were obtained in most patients by all three methods, and the overall image quality of axial images did not differ significantly among the imaging methods, although superior reformatted coronal images were obtained by gated high-resolution imaging. The detection rates of malignant liver lesions were similar among the three imaging methods, although lesion conspicuity was significantly better for breath-hold imaging compared to gated imaging. Conclusions Navigator-gated imaging provided image qualities and detection rates of malignant liver lesions comparable to breath-hold imaging in Gd-EOB-DTPA-enhanced MR imaging; however, no additional benefits of high-resolution imaging were proven for lesion evaluation.
- Subjects :
- Gadolinium DTPA
Male
medicine.medical_specialty
Image quality
Contrast Media
Gd-EOB-DTPA
Gating
030218 nuclear medicine & medical imaging
Breath Holding
Lesion
03 medical and health sciences
Imaging, Three-Dimensional
0302 clinical medicine
medicine
Humans
Radiology, Nuclear Medicine and imaging
Image resolution
Aged
medicine.diagnostic_test
business.industry
Respiration
Liver Neoplasms
Reproducibility of Results
Magnetic resonance imaging
General Medicine
Image Enhancement
Magnetic Resonance Imaging
Liver
Coronal plane
Female
Radiology
medicine.symptom
Nuclear medicine
business
030217 neurology & neurosurgery
Respiratory navigator
Subjects
Details
- ISSN :
- 0720048X
- Volume :
- 85
- Database :
- OpenAIRE
- Journal :
- European Journal of Radiology
- Accession number :
- edsair.doi.dedup.....01fd5f4423eb816346b26d055982defb