MRI of the pelvis at 3 T: very high spatial resolution with sensitivity encoding and flip-angle sweep technique in clinically acceptable scan time

Morakkabati-Spitz, N; Gieseke, J.; Kuhl, Christiane K.; Lutterbey, G.; Falkenhausen, M. von; Träber, Frank; Park‐Simon, Tjoung‐Won; Zivanovic, Oliver; Schild, Hans H.

doi:10.1007/s00330-005-0016-1

Cited by 45 publications

(31 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their study revealed comparable image contrast for the 1.5-T and 3-T protocols. 1 They concluded that there was no difference between the two systems in tumor diagnosis and staging. However, no case of endometrial cancer was considered in their population.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of MR Imaging in endometrial cancer: our experience

Sampath

Nema

Agarwal

et al. 2017

Int J Reprod Contracept Obstet Gynecol

View full text Add to dashboard Cite

Background: MRI is a useful modality for preoperative imaging in endometrial cancer. We report our experience in Indian population managed at a tertiary care center regarding accuracy of preoperative MRI in prediction of deep myometrial invasion and cervical stromal invasion.Methods: 30 patients with endometrioid adenocarcinoma endometrium on endometrial biopsy underwent preoperative MRI in the week preceding surgery. MRI impression of depth of myometrial invasion, cervical stroma involvement and positive nodes were compared with final histopathology findings to calculate the accuracy of MRI.Results: The accuracy of MRI for estimation of tumour size was 72% and for detection of myometrial invasion was 76%. The accuracy for detection of cervical, adnexal and nodal involvement was 96%, 100% and 96% respectively.Conclusions: MRI is an accurate modality for preoperative assessment in endometrial cancer and can significantly assist in surgical planning.

show abstract

Section: Discussionmentioning

confidence: 99%

Accuracy of MR Imaging in endometrial cancer: our experience

Sampath

Nema

Agarwal

et al. 2017

Int J Reprod Contracept Obstet Gynecol

View full text Add to dashboard Cite

show abstract

“…In this study we reduced the flip angle on all sequences at 3.0T to avoid exceeding the SAR limits, and MRCP at 3.0T was performed safely in all volunteers without any complications. Flip-angle reduction is another promising technique, and its clinical utility was suggested by a recent report (12). Although the reduction of flip angle may induce changes in image contrast between fluid and soft tissue, in our study the bile and pancreatic ducts were clearly visualized by MRCP images on all sequences at 3.0T, and the CNR of heavily T2W images obtained with breath-held multislice HASTE with a reduced flip angle at 3.0T was not inferior to that of heavily T2W images obtained with a higher flip angle at 1.5T.…”

Section: Discussionmentioning

confidence: 99%

MRCP imaging at 3.0 T vs. 1.5 T: Preliminary experience in healthy volunteers

Isoda

Kataoka

Maetani

et al. 2007

Magnetic Resonance Imaging

View full text Add to dashboard Cite

Purpose:To evaluate the impact of magnetic resonance cholangiopancreatography (MRCP) imaging at 1.5T and 3.0T on image quality. Materials and Methods:Fourteen volunteers were examined at both 1.5T and 3.0T using MRCP imaging performed with a breath-held two-dimensional (2D) half-Fourier acquired single-shot turbo spin-echo (HASTE) thick-slab sequence, a free-breathing navigator-triggered three-dimensional (3D) turbo spin-echo (TSE) sequence with prospective acquisition correction, and a heavily T2-weighted (T2W) sequence with breath-held multislice HASTE. All images were scored for visualization of the biliary and pancreatic ducts, severity of artifacts, image noise, and overall image quality.Results: MRCP imaging at 3.0T yielded a significant improvement in overall image quality compared to 1.5T. We found a trend for superior visualization of the biliary and pancreatic ducts at 3.0T. Heavily T2W imaging with thin sections (1.4 mm) at 3.0T provided diagnostic images and better visualization of the biliary and pancreatic ducts than heavily T2W imaging with standard sections (2.8 mm) at 3.0T. Conclusion:Our experience suggests that MRCP imaging at 3.0T has the potential to provide excellent images. Highresolution heavily T2W imaging with a small voxel size (1.3 ϫ 1.3 ϫ 1.4 mm) at 3.0T can provide diagnostic images and allow evaluation of small pathologies of the bile and pancreatic ducts, which 1.5T MRI cannot sufficiently visualize.

show abstract

“…The higher fi eld strength provides a higher signalto-noise ratio and spatial resolution ( 15 ), and these may help improve diagnostic accuracy for small lesions compared with 1.5 T ( 16 ). However, the higher fi eld strength also comes with greater fi eld inhomogeneity, stronger susceptibility effects, longer T1 relaxation times, larger chemical shift, and higher radiofrequency deposition ( 17,18 ), which may cause lower signal in some parts of the image and show less contrast enhancement, which in turn may lead to false-negative diagnoses (19)(20)(21). With all these concerns, clinical breast MR imaging is N eoadjuvant chemotherapy (NAC) is the standard-of-care treatment for locally advanced inoperable breast cancer, but it is increasingly being used for patients with operable cancer ( 1,2 ).…”

Section: Patientsmentioning

confidence: 99%

Breast Cancer: Evaluation of Response to Neoadjuvant Chemotherapy with 3.0-T MR Imaging

Chen

Bahri²,

Mehta³

et al. 2011

Radiology

View full text Add to dashboard Cite

Purpose:To assess how the molecular biomarker status of a breast cancer, including human epidermal growth factor receptor 2 (HER2), hormone receptors, and the proliferation marker Ki-67 status, affects the diagnosis at 3.0-T magnetic resonance (MR) imaging. Materials and Methods:This study was approved by the institutional review board and was HIPAA compliant. Fifty patients (age range, 28-82 years; mean age, 49 years) receiving neoadjuvant chemotherapy were monitored with 3.0-T MR imaging. The longest dimension of the residual cancer was measured at MR imaging and correlated with pathologic fi ndings.Patients were further divided into subgroups on the basis of HER2, hormone receptor, and Ki-67 status. Pathologic complete response (pCR) was defi ned as when there were no residual invasive cancer cells. The Pearson correlation was used to correlate MR imaging-determined and pathologic tumor size, and the unpaired t test was used to compare MR imaging-pathologic size discrepancies. Results:Of the 50 women, 14 achieved pCR. There were seven false-negative diagnoses at MR imaging. The overall sensitivity, specifi city, and accuracy for diagnosing invasive residual disease at MR imaging were 81%, 93%, and 84%, respectively. The mean MR imaging-pathologic size discrepancy was 0.5 cm 6 0.9 (standard deviation) for HER2-positive cancer and 2.3 cm 6 3 .5 for HER2-negative cancer ( P = .009). In the HER2-negative group, the size discrepancy was smaller for hormone receptor-negative than for hormone receptor-positive cancers (1.0 cm 6 1.1 vs 3.0 cm 6 4.0, P = .04). The size discrepancy was smaller in patients with 40% or greater Ki-67 expression (0.8 cm 6 1.1) than in patients with 10% or less Ki-67 expression (3.9 cm 6 5.1, P = .06). Conclusion:The diagnostic accuracy of breast MR imaging is better in more aggressive than in less aggressive cancers. When MR imaging is used for surgical planning, caution should be taken with HER2-negative hormone receptor-positive cancers.q RSNA, 2011Supplemental material : http://radiology.rsna.org/lookup /suppl

show abstract

MRI of the pelvis at 3 T: very high spatial resolution with sensitivity encoding and flip-angle sweep technique in clinically acceptable scan time

Abstract: High spatial resolution pelvic studies with high image quality can be obtained at 3 T in acceptable scan time. The higher spatial resolution that is feasible at 3 T also provides more clinically relevant information.

Cited by 45 publications

References 27 publications

Accuracy of MR Imaging in endometrial cancer: our experience

Accuracy of MR Imaging in endometrial cancer: our experience

MRCP imaging at 3.0 T vs. 1.5 T: Preliminary experience in healthy volunteers

Breast Cancer: Evaluation of Response to Neoadjuvant Chemotherapy with 3.0-T MR Imaging

Contact Info

Product

Resources

About