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https://www.readbyqxmd.com/read/28300372/lung-volume-reproducibility-under-abc-control-and-self-sustained-breath-holding
#1
Evangelia Kaza, Alex Dunlop, Rafal Panek, David J Collins, Matthew Orton, Richard Symonds-Tayler, Dualta McQuaid, Erica Scurr, Vibeke Hansen, Martin O Leach
An Active Breathing Coordinator (ABC) can be employed to induce breath-holds during CT imaging and radiotherapy of lung, breast and liver cancer, and recently during lung cancer MRI. The apparatus measures and controls respiratory volume, hence subject lung volume reproducibility is its principal measure of effectiveness. To assess ABC control quality, the intra-session reproducibility of ABC-induced lung volumes was evaluated and compared with that reached by applying the clinical standard of operator-guided self-sustained breath-holds on healthy volunteers during MRI...
March 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28295791/value-of-breast-mri-for-patients-with-a-biopsy-showing-atypical-ductal-hyperplasia-adh
#2
Keiko Tsuchiya, Naoko Mori, David V Schacht, Deepa Sheth, Gregory S Karczmar, Gillian M Newstead, Hiroyuki Abe
PURPOSE: To evaluate the diagnostic value of dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) for patients with atypical ductal hyperplasia (ADH) in predicting malignant upgrade. MATERIALS AND METHODS: 3T DCE-MRI was performed for 17 patients with ADH (median age 52, range 42-76) proven by stereotactic biopsy (n = 15), and ultrasound-guided biopsy (n = 2) from January 2011 to April 2015. All patients underwent surgical excision after the MRI...
March 10, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28286021/role-of-breast-magnetic-resonance-imaging-in-predicting-residual-lobular-carcinoma-in-situ-after-initial-excision
#3
Ryu Kyung Lee, Hye Jung Kim, Jeeyeon Lee
BACKGROUND: Breast magnetic resonance (MR) imaging is a useful screening modality in detecting suspicious lesions in patients with a history of lobular carcinoma in situ (LCIS). This study aimed to evaluate the effectiveness of breast MR imaging in detecting remnant LCIS lesions after initial excision. METHODS: Between 2011 and 2015, 29 patients with LCIS who underwent initial excision were enrolled. Breast ultrasonography and breast MR imaging was conducted after initial excision...
March 9, 2017: Asian Journal of Surgery
https://www.readbyqxmd.com/read/28267530/evaluation-of-pet-and-mr-datasets-in-integrated-18f-fdg-pet-mri-a-comparison-of-different-mr-sequences-for-whole-body-restaging-of-breast-cancer-patients
#4
Johannes Grueneisen, Lino Morris Sawicki, Axel Wetter, Julian Kirchner, Sonja Kinner, Bahriye Aktas, Michael Forsting, Verena Ruhlmann, Lale Umutlu
OBJECTIVES: To investigate the diagnostic value of different MR sequences and 18F-FDG PET data for whole-body restaging of breast cancer patients utilizing PET/MRI. METHODS: A total of 36 patients with suspected tumor recurrence of breast cancer based on clinical follow-up or abnormal findings in follow-up examinations (e.g. CT, MRI) were prospectively enrolled in this study. All patients underwent a PET/CT and subsequently an additional PET/MR scan. Two readers were instructed to identify the occurrence of a tumor relapse in subsequent MR and PET/MR readings, utilizing different MR sequence constellations for each session...
April 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28253106/computer-aided-diagnosis-generated-kinetic-features-of-breast-cancer-at-preoperative-mr-imaging-association-with-disease-free-survival-of-patients-with-primary-operable-invasive-breast-cancer
#5
Jin Joo Kim, Jin You Kim, Hyun Jung Kang, Jong Ki Shin, Taewoo Kang, Seok Won Lee, Young Tae Bae
Purpose To retrospectively investigate the relationship between the kinetic features of breast cancer assessed with computer-aided diagnosis (CAD) at preoperative magnetic resonance (MR) imaging and disease-free survival in patients with primary operable invasive breast cancer. Materials and Methods This retrospective study was approved by the institutional review board. The requirement to obtain informed consent was waived. The authors identified 329 consecutive women (mean age, 52.9 years; age range, 32-88 years) with newly diagnosed invasive breast cancer who had undergone preoperative MR imaging and surgery between January 2012 and February 2013...
March 2, 2017: Radiology
https://www.readbyqxmd.com/read/28246950/biomarkers-from-in-vivo-molecular-imaging-of-breast-cancer-pretreatment-18-f-fdg-pet-predicts-patient-prognosis-and-pretreatment-dwi-mr-predicts-response-to-neoadjuvant-chemotherapy
#6
Francesca Gallivanone, Marta Maria Panzeri, Carla Canevari, Claudio Losio, Luigi Gianolli, Francesco De Cobelli, Isabella Castiglioni
OBJECTIVE: Human cancers display intra-tumor phenotypic heterogeneity and recent research has focused on developing image processing methods extracting imaging descriptors to characterize this heterogeneity. This work assesses the role of pretreatment (18)F-FDG PET and DWI-MR with respect to the prognosis and prediction of neoadjuvant chemotherapy (NAC) outcomes when image features are used to characterize primitive lesions from breast cancer (BC). MATERIALS AND METHODS: A retrospective protocol included 38 adult women with biopsy-proven BC...
February 28, 2017: Magma
https://www.readbyqxmd.com/read/28245075/lymphedema-evaluation-using-noninvasive-3t-mr-lymphangiography
#7
Rachelle Crescenzi, Paula M C Donahue, Katherine G Hartley, Aditi A Desai, Allison O Scott, Vaughn Braxton, Helen Mahany, Sarah K Lants, Manus J Donahue
PURPOSE: To exploit the long 3.0T relaxation times and low flow velocity of lymphatic fluid to develop a noninvasive 3.0T lymphangiography sequence and evaluate its relevance in patients with lymphedema. MATERIALS AND METHODS: A 3.0T turbo-spin-echo (TSE) pulse train with long echo time (TEeffective  = 600 msec; shot-duration = 13.2 msec) and TSE-factor (TSE-factor = 90) was developed and signal evolution simulated. The method was evaluated in healthy adults (n = 11) and patients with unilateral breast cancer treatment-related lymphedema (BCRL; n = 25), with a subgroup (n = 5) of BCRL participants scanned before and after manual lymphatic drainage (MLD) therapy...
February 28, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28241419/the-effects-of-iodine-fortified-milk-on-the-iodine-status-of-lactating-mothers-and-infants-in-an-area-with-a-successful-salt-iodization-program-a-randomized-controlled-trial
#8
Pantea Nazeri, Parvin Mirmiran, Zhale Tahmasebinejad, Mehdi Hedayati, Hossein Delshad, Fereidoun Azizi
Iodine deficiency during the first two years of life may cause irreversible brain damage and mental retardation. The aim of the present study was to investigate, for the first time, the effect of iodine fortified milk on the iodine status of lactating mothers and their infants. In this multicenter randomized controlled trial, 84 lactating mother-infant pairs from health care centers were randomly selected. After meeting the inclusion criteria, lactating mothers were randomly assigned to two groups: the iodine fortified milk group and the control group (n = 42 each)...
February 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28221097/supplemental-breast-mr-imaging-screening-of-women-with-average-risk-of-breast-cancer
#9
Christiane K Kuhl, Kevin Strobel, Heribert Bieling, Claudia Leutner, Hans H Schild, Simone Schrading
Purpose To investigate the utility and accuracy of breast magnetic resonance (MR) imaging as a supplemental screening tool in women at average risk for breast cancer and to investigate the types of cancer detected with MR imaging screening. Materials and Methods This prospective observational study was conducted at two academic breast centers in women aged 40-70 years without breast cancer-associated risk factors (lifetime risk <15%). Between January 2005 and December 2013, women with at least minimal residual breast tissue (American College of Radiology categories A-D) and normal conventional imaging findings (screening mammography with or without screening ultrasonography [US]) were invited to undergo supplemental MR imaging screening...
February 21, 2017: Radiology
https://www.readbyqxmd.com/read/28208155/pet-mr-in-invasive-ductal-breast-cancer-correlation-between-imaging-markers-and-histological-phenotype
#10
Onofrio Antonio Catalano, Gary Lloyd Horn, Alberto Signore, Carlo Iannace, Maria Lepore, Mark Vangel, Angelo Luongo, Marco Catalano, Constance Lehman, Marco Salvatore, Andrea Soricelli, Ciprian Catana, Umar Mahmood, Bruce Robert Rosen
BACKGROUND: Differences in genetics and receptor expression (phenotypes) of invasive ductal breast cancer (IDC) impact on prognosis and treatment response. Immunohistochemistry (IHC), the most used technique for IDC phenotyping, has some limitations including its invasiveness. We explored the possibility of contrast-enhanced positron emission tomography magnetic resonance (CE-FDG PET/MR) to discriminate IDC phenotypes. METHODS: 21 IDC patients with IHC assessment of oestrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor-2 (HER2), and antigen Ki-67 (Ki67) underwent CE-FDG PET/MR...
February 16, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28186859/multimodality-imaging-based-evaluation-of-single-lumen-silicone-breast-implants-for-rupture
#11
Stephen J Seiler, Pooja B Sharma, Jody C Hayes, Ramapriya Ganti, Ann R Mootz, Emily D Eads, Sumeet S Teotia, W Phil Evans
Breast implants are frequently encountered on breast imaging studies, and it is essential for any radiologist interpreting these studies to be able to correctly assess implant integrity. Ruptures of silicone gel-filled implants often occur without becoming clinically obvious and are incidentally detected at imaging. Early diagnosis of implant rupture is important because surgical removal of extracapsular silicone in the breast parenchyma and lymphatics is difficult. Conversely, misdiagnosis of rupture may prompt a patient to undergo unnecessary additional surgery to remove the implant...
March 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28185146/mr-imaging-features-associated-with-distant-metastasis-free-survival-of-patients-with-invasive-breast-cancer-a-case-control-study
#12
Sung Eun Song, Sung Ui Shin, Hyeong-Gon Moon, Han Suk Ryu, Kwangsoo Kim, Woo Kyung Moon
PURPOSE: Preoperative breast magnetic resonance (MR) imaging features of primary breast cancers may have the potential to act as prognostic biomarkers by providing morphologic and kinetic features representing inter- or intra-tumor heterogeneity. Recent radiogenomic studies reveal that several radiologist-annotated image features are associated with genes or signal pathways involved in tumor progression, treatment resistance, and distant metastasis (DM). We investigate whether preoperative breast MR imaging features are associated with worse DM-free survival in patients with invasive breast cancer...
February 9, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28168682/a-magnetic-resonance-image-guided-breast-needle-intervention-robot-system-overview-and-design-considerations
#13
Samuel Byeongjun Park, Jung-Gun Kim, Ki-Woong Lim, Chae-Hyun Yoon, Dong-Jun Kim, Han-Sung Kang, Yung-Ho Jo
PURPOSE: We developed an image-guided intervention robot system that can be operated in a magnetic resonance (MR) imaging gantry. The system incorporates a bendable needle intervention robot for breast cancer patients that overcomes the space limitations of the MR gantry. METHODS: Most breast coil designs for breast MR imaging have side openings to allow manual localization. However, for many intervention procedures, the patient must be removed from the gantry. A robotic manipulation system with integrated image guidance software was developed...
February 6, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28166261/radiomic-analysis-reveals-dce-mri-features-for-prediction-of-molecular-subtypes-of-breast-cancer
#14
Ming Fan, Hui Li, Shijian Wang, Bin Zheng, Juan Zhang, Lihua Li
The purpose of this study was to investigate the role of features derived from breast dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and to incorporated clinical information to predict the molecular subtypes of breast cancer. In particular, 60 breast cancers with the following four molecular subtypes were analyzed: luminal A, luminal B, human epidermal growth factor receptor-2 (HER2)-over-expressing and basal-like. The breast region was segmented and the suspicious tumor was depicted on sequentially scanned MR images from each case...
2017: PloS One
https://www.readbyqxmd.com/read/28162171/-application-study-of-differentiating-malignant-benign-from-breast-lesions-using-multiple-b-value-dwi
#15
H B Dong, G Y Wang, Y D Li
Objective: To explore the diagnostic value of multi b-value DWI (MB-DWI) in the identification of benign and malignant breast lesions. Methods: From October 2013 to December 2015, a total of 54 cases from Ningbo Medical Center Lihuili Hospital (22 benign cases with a total of 24 lesions, 32 malignant cases with a total of 38 lesions) were examined with conventional MR scan, single b-value DWI, and multiple b-value DWI (0, 10, 20, 30, 50, 100, 200, 400, 800, 1 200, 2 000, 3 000 s/mm(2)). GE ADW4.5 workstation was used to calculate the value of standard apparent diffusion coefficient (ADC(standard)), slow apparent diffusion coefficient(ADC(slow)), fast apparent diffusion coefficient (ADC(fast)) and fraction of ADC(fast)(f(fast))...
January 17, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28152264/prediction-of-malignancy-by-a-radiomic-signature-from-contrast-agent-free-diffusion-mri-in-suspicious-breast-lesions-found-on-screening-mammography
#16
Sebastian Bickelhaupt, Daniel Paech, Philipp Kickingereder, Franziska Steudle, Wolfgang Lederer, Heidi Daniel, Michael Götz, Nils Gählert, Diana Tichy, Manuel Wiesenfarth, Frederik B Laun, Klaus H Maier-Hein, Heinz-Peter Schlemmer, David Bonekamp
PURPOSE: To assess radiomics as a tool to determine how well lesions found suspicious on breast cancer screening X-ray mammography can be categorized into malignant and benign with unenhanced magnetic resonance (MR) mammography with diffusion-weighted imaging and T2 -weighted sequences. MATERIALS AND METHODS: From an asymptomatic screening cohort, 50 women with mammographically suspicious findings were examined with contrast-enhanced breast MRI (ceMRI) at 1.5T. Out of this protocol an unenhanced, abbreviated diffusion-weighted imaging protocol (ueMRI) including T2 -weighted, (T2 w), diffusion-weighted imaging (DWI), and DWI with background suppression (DWIBS) sequences and corresponding apparent diffusion coefficient (ADC) maps were extracted...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28121639/ultrasound-tomography-evaluation-of-breast-density-a-comparison-with-noncontrast-magnetic-resonance-imaging
#17
Elizabeth A M OʼFlynn, Jeremie Fromageau, Araminta E Ledger, Alessandro Messa, Ashley DʼAquino, Minouk J Schoemaker, Maria Schmidt, Neb Duric, Anthony J Swerdlow, Jeffrey C Bamber
OBJECTIVES: Ultrasound tomography (UST) is an emerging whole-breast 3-dimensional imaging technique that obtains quantitative tomograms of speed of sound of the entire breast. The imaged parameter is the speed of sound which is used as a surrogate measure of density at each voxel and holds promise as a method to evaluate breast density without ionizing radiation. This study evaluated the technique of UST and compared whole-breast volume averaged speed of sound (VASS) with MR percent water content from noncontrast magnetic resonance imaging (MRI)...
January 24, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28108330/pleiotropic-responses-to-methionine-restriction
#18
Gene P Ables, Jay E Johnson
Methionine restriction (MR) extends lifespan across different species. The main responses of rodent models to MR are well-documented in adipose tissue (AT) and liver, which have reduced mass and improved insulin sensitivity, respectively. Recently, molecular mechanisms that improve healthspan have been identified in both organs during MR. In fat, MR induced a futile lipid cycle concomitant with beige AT accumulation, producing elevated energy expenditure. In liver, MR upregulated fibroblast growth factor 21 and improved glucose metabolism in aged mice and in response to a high-fat diet...
January 17, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28104942/accuracy-of-mri-for-prediction-of-response-to-neo-adjuvant-chemotherapy-in-triple-negative-breast-cancer-compared-to-other-subtypes-of-breast-cancer
#19
Gaurav J Bansal, Divya Santosh
PURPOSE: The aim of this study was to compare the accuracy of magnetic resonance imaging (MRI) for the prediction of response to neo-adjuvant chemotherapy in triple negative (TN) breast cancer, with respect to other subtypes. MATERIALS AND METHODS: There were a total of 1610 breast cancers diagnosed between March 2009 and August 2014, out of which 82 patients underwent MRI before and after neo-adjuvant chemotherapy but just before surgery. TN cancers were analyzed with respect to others subtypes...
October 2016: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28102957/rf-safety-assessment-of-a-bilateral-four-channel-transmit-receive-7-tesla-breast-coil-sar-versus-tissue-temperature-limits
#20
COMPARATIVE STUDY
Thomas M Fiedler, Mark E Ladd, Andreas K Bitz
PURPOSE: The purpose of this work was to perform an RF safety evaluation for a bilateral four-channel transmit/receive breast coil and to determine the maximum permissible input power for which RF exposure of the subject stays within recommended limits. The safety evaluation was done based on SAR as well as on temperature simulations. In comparison to SAR, temperature is more directly correlated with tissue damage, which allows a more precise safety assessment. The temperature simulations were performed by applying three different blood perfusion models as well as two different ambient temperatures...
January 2017: Medical Physics
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