scholarly journals Breast MR Imaging: What the Radiologist Needs to Know

2011 ◽  
Vol 1 ◽  
pp. 48 ◽  
Author(s):  
Gurpreet S. Dhillon ◽  
Nick Bell ◽  
Daniel T. Ginat ◽  
Alena Levit ◽  
Stamatia Destounis ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Breast Mri ◽  
Response To Therapy ◽  
Recurrent Tumor ◽  
Resonance Imaging ◽  
Pictorial Review ◽  
Breast Mr ◽  
General Radiologist ◽  
Magnetic Resonance Imaging Mri

Magnetic resonance imaging (MRI) of the breast is being performed more frequently to improve primary and recurrent tumor detection, characterization, and response to therapy. Sensitivity of this test approaches 90% and the specificity ranges from 37% to 100%. We present a concise tutorial for the general radiologist with a pictorial review of common lesions identified with breast MRI.

scholarly journals Magnetic Resonance Imaging of the Anal Region: Clinical Applications

2020 ◽  
Vol 10 ◽  
pp. 76
Author(s):  
Giuseppe Cicero ◽  
Giorgio Ascenti ◽  
Alfredo Blandino ◽  
Socrate Pallio ◽  
Claudia Abate ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Anal Canal ◽  
Three Dimensional ◽  
Resonance Imaging ◽  
Pictorial Review ◽  
Clinical Scenarios ◽  
Mri Protocol ◽  
Magnetic Resonance Imaging Mri ◽  
Dedicated Mri

Over the past years, magnetic resonance imaging (MRI) has become a cornerstone in evaluating anal canal and adjacent tissues due to its safeness, the three-dimensional and comprehensive approach, and the high soft-tissue resolution. Several diseases arising in the anal canal can be assessed through MRI performance, including congenital conditions, benign pathologies, and malignancies. Good knowledge of the normal anatomy and MRI technical protocols is, therefore, mandatory for appropriate anal pathology evaluation. Radiologists and clinicians should be familiar with the different clinical scenarios and the anatomy of the structures involved. This pictorial review presents an overview of the diseases affecting the anal canal and the surrounding structures evaluated with dedicated MRI protocol.

scholarly journals Assessing Response to Radiation Therapy Treatment of Bone Metastases: Short-Term Followup of Radiation Therapy Treatment of Bone Metastases with Diffusion-Weighted Magnetic Resonance Imaging

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Salvatore Cappabianca ◽  
Raffaella Capasso ◽  
Fabrizio Urraro ◽  
Andrea Izzo ◽  
Antonio Raucci ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Radiation Therapy ◽  
Magnetic Resonance ◽  
Bone Metastases ◽  
Residual Tumor ◽  
Response To Therapy ◽  
Resonance Imaging ◽  
Diffusion Weighted ◽  
Magnetic Resonance Imaging Mri ◽  
Therapy Treatment

This study examined the usefulness of diffusion-weighted (DW) Magnetic Resonance Imaging (MRI) in monitoring bone metastases response to radiation therapy in 15 oligometastatic patients. For each metastasis, both mean apparent diffusion coefficient (ADC) changes and high b-value DW metastasis/muscle signal intensity ratio (SIR) variations were evaluated at 30 ± 5 days and 60 ± 7 days after the end of treatment. On baseline DW-MRI, all bone metastases were hyperintense and had signal intensities higher than normal bone marrow on calculated ADC maps. At follow-up evaluations, 4 patterns of response were identified: (I) decreased high b-value DW SIR associated with increased mean ADC (83.3% of cases); (II) increased mean ADC with no change of high b-value DW SIR (10% of cases); (III) decreased both high b-value DW SIR and mean ADC (3.3% of cases); (IV) a reduction in mean ADC associated with an increase in high b-value DW SIR compared to pretreatment values (3.3% of cases). Patterns (I) and (II) suggested a good response to therapy; pattern (III) was classified as indeterminate, while pattern (IV) was suggestive of disease progression. This pattern approach may represent a useful tool in the differentiation between treatment-induced necrosis and highly cellular residual tumor.

scholarly journals Magnetic Resonance Imaging of Rectal Cancer

2019 ◽  
Vol 02 (01) ◽  
pp. 018-032
Author(s):  
Ekta Maheshwari ◽  
Gitanjali Bajaj ◽  
Kedar Jambhekar ◽  
Tarun Pandey ◽  
Roopa Ram
Keyword(s):  
Magnetic Resonance Imaging ◽  
Rectal Cancer ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Imaging Techniques ◽  
Postoperative Recurrence ◽  
Response To Therapy ◽  
Resonance Imaging ◽  
Primary Rectal Cancer ◽  
Magnetic Resonance Imaging Mri

AbstractHigh-resolution magnetic resonance imaging (MRI) plays a pivotal role in the pretreatment assessment of primary rectal cancer. The success of this technique depends on obtaining good-quality high-resolution T2-weighted images of the primary tumor, orthogonal to rectal lumen. The goal of magnetic resonance staging is to identify patients who will benefit from neoadjuvant therapy prior to surgery to minimize postoperative recurrence and planning of optimal surgical approach. MRI also facilitates optimal identification of important prognostic factors, which improves both treatment selection and posttreatment follow-up. The objective of this article is to review the existing literature and provide a concise update on various aspects of rectal cancer imaging, discuss the current role of advanced imaging techniques such as diffusion-weighted and perfusion imaging in the evaluation of rectal cancer, and to assess response to therapy.

Establishing a Comprehensive Breast Magnetic Resonance Imaging Service in a Community Hospital

2011 ◽  
Vol 62 (1) ◽  
pp. 22-30 ◽  
Author(s):  
Neety Panu ◽  
Elizabeth Morris
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Breast Magnetic Resonance Imaging ◽  
Breast Mri ◽  
Resonance Imaging ◽  
Team Members ◽  
Assessment Centre ◽  
Imaging Service ◽  
Breast Magnetic Resonance ◽  
Magnetic Resonance Imaging Mri

Advances made since the first application of breast magnetic resonance imaging (MRI) in the late 1980s have made it an integral complement to a comprehensive breast assessment centre. Incorporating breast MRI into an existing practice can appear daunting, but a structured and organized approach allows for a smoother transition. With a well thought out plan that engages all team members and experience in interpretation and performing of interventional procedures, breast MRI will serve to add valuable information in patient management.

scholarly journals Diagnostic performance of mammography and magnetic resonance imaging for evaluating mammographically visible breast masses

2021 ◽  
Vol 49 (9) ◽  
pp. 030006052097309
Author(s):  
Xueli Zhu ◽  
Yi Cao ◽  
Ruidie Li ◽  
Mingxia Zhu ◽  
Xin Chen
Keyword(s):  
Breast Cancer ◽  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Breast Mri ◽  
Resonance Imaging ◽  
Predictive Values ◽  
Breast Masses ◽  
Significant Difference ◽  
Diagnostic Values ◽  
Magnetic Resonance Imaging Mri

Objective We compared the diagnostic values of mammography and magnetic resonance imaging (MRI) for evaluating breast masses. Methods We retrospectively analyzed mammography, MRI, and histopathological data for 377 patients with breast masses on mammography, including 73 benign and 304 malignant masses. Results The sensitivities and negative predictive values (NPVs) were significantly higher for MRI compared with mammography for detecting breast cancer (98.4% vs. 89.8% and 87.8% vs. 46.6%, respectively). The specificity and positive predictive values (PPV) were similar for both techniques. Compared with mammography alone, mammography plus MRI improved the specificity (67.1% vs. 37.0%) and PPV (91.8% vs. 85.6%), but there was no significant difference in sensitivity or NPV. Compared with MRI alone, the combination significantly improved the specificity (67.1% vs. 49.3%), but the sensitivity (88.5% vs. 98.4%) and NPV (58.3% vs. 87.8%) were reduced, and the PPV was similar in both groups. There was no significant difference between mammography and MRI in terms of sensitivity or specificity among 81 patients with breast masses with calcification. Conclusion Breast MRI improved the sensitivity and NPV for breast cancer detection. Combining MRI and mammography improved the specificity and PPV, but MRI offered no advantage in patients with breast masses with calcification.

scholarly journals Perinatal post-mortem magnetic resonance imaging (MRI) of the central nervous system (CNS): a pictorial review

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Carlos Pérez-Serrano ◽  
Álvaro Bartolomé ◽  
Núria Bargalló ◽  
Carmen Sebastià ◽  
Alfons Nadal ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Central Nervous System ◽  
Nervous System ◽  
Magnetic Resonance ◽  
Post Mortem ◽  
Resonance Imaging ◽  
Pictorial Review ◽  
The Central Nervous System ◽  
Magnetic Resonance Imaging Mri ◽  
Histopathological Results

AbstractCentral nervous system (CNS) abnormalities cause approximately 32–37.7% of terminations of pregnancy (TOP). Autopsy is currently the gold standard for assessing dead foetuses and stillborn. However, it has limitations and is sometimes subject to parental rejection. Recent studies have described post-mortem foetal magnetic resonance imaging (MRI) as an alternative and even complementary to autopsy for CNS assessment. Radiologists now play a key role in the evaluation of perinatal deaths. Assessment of foetal CNS abnormalities is difficult, and interpretation of foetal studies requires familiarisation with normal and abnormal findings in post-mortem MRI studies as well as the strengths and limitations of the imaging studies. The purpose of this pictorial review is to report our experience in the post-mortem MRI evaluation of the CNS system, including a description of the protocol used, normal CNS findings related to post-mortem status, abnormal CNS findings in our sample, and the correlation of these findings with histopathological results.

scholarly journals Histopathologic Correlates of Nonmass Enhancement Detected by Breast Magnetic Resonance Imaging

2021 ◽  
Author(s):  
Vanda F. Torous ◽  
Nancy A. Resteghini ◽  
Jordana Phillips ◽  
Vandana Dialani ◽  
Priscilla J. Slanetz ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Ductal Carcinoma ◽  
Imaging Modality ◽  
Breast Mri ◽  
Imaging Features ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Malignant Lesions ◽  
Magnetic Resonance Imaging Mri

Context.— Dynamic, contrast-enhanced magnetic resonance imaging (MRI) is a highly sensitive imaging modality used for screening and diagnostic purposes. Nonmass enhancement (NME) is commonly seen on MRI of the breast. However, the pathologic correlates of NME have not been extensively explored. Consequently, concordance between MRI and pathologic findings in such cases may be uncertain and this uncertainty may cause the need for additional procedures. Objective.— To examine the histologic alterations that correspond to NME on MRI. Design.— We performed a retrospective search for women who underwent breast MRI between March 2014 and December 2016 and identified 130 NME lesions resulting in biopsy. The MRI findings and pathology slides for all cases were reviewed. The follow-up findings on any subsequent excisions were also noted. Results.— Among the 130 cases, the core needle biopsy showed 1 or more benign lesions without atypia in 80 cases (62%), atypical lesions in 21 (16%), ductal carcinoma in situ in 22 (17%), and invasive carcinoma in 7 (5%). Review of the imaging features demonstrated some statistically significant differences in lesions that corresponded to malignant lesions as compared with benign alterations, including homogeneous or clumped internal enhancement, type 3 kinetics, and T2 dark signal; however, there was considerable overlap of features between benign and malignant lesions overall. Of 130 cases, 54 (41.5%) underwent subsequent excision with only 6 cases showing a worse lesion on excision. Conclusions.— This study illustrates that NME can be associated with benign, atypical, and/or malignant pathology and biopsy remains indicated given the overlap of radiologic features.

scholarly journals Role of magnetic resonance imaging in breast cancer management

2018 ◽  
Vol 07 (02) ◽  
pp. 069-071 ◽  
Author(s):  
Selvi Radhakrishna ◽  
S. Agarwal ◽  
Purvish M. Parikh ◽  
K. Kaur ◽  
Shikha Panwar ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Magnetic Resonance Imaging ◽  
High Risk ◽  
Magnetic Resonance ◽  
Breast Mri ◽  
Average Risk ◽  
Resonance Imaging ◽  
Cancer Management ◽  
Breast Cancer Management ◽  
Magnetic Resonance Imaging Mri

AbstractMagnetic resonance imaging (MRI) of the breast is primarily used as a supplemental tool to breast screening with mammography or ultrasound. A breast MRI is mainly used for women who have been diagnosed with breast cancer, to help measure the size of the cancer, look for other tumors in the breast, and to check for tumors in the opposite breast. For certain women at high risk for breast cancer, a screening MRI is recommended along with a yearly mammogram. MRI is known to give some false positive results which mean more test and/or biopsies for the patient. Thus, although breast MRI is useful for women at high risk, it is rarely recommended as a screening test for women at average risk of breast cancer. Also, breast MRI does not show calcium deposits, known as micro-calcifications which can be a sign of breast cancer.

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