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Magnetic resonance imaging

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https://www.readbyqxmd.com/read/28817878/re-diagnostic-performance-of-diffusion-weighted-magnetic-resonance-imaging-in-differentiating-human-renal-lesions-benignity-or-malignancy-a%C3%A2-meta-analysis
#1
https://www.readbyqxmd.com/read/28817780/us-internists-awareness-and-use-of-overtreatment-guidelines-a-national-survey
#2
Kira L Ryskina, Eric S Holmboe, Elizabeth Bernabeo, Rachel M Werner, Judy A Shea, Judith A Long
OBJECTIVES: To assess physician views and perceived adoption of overtreatment guidelines and measure whether adoption of these guidelines influenced the recommendation of a targeted service. STUDY DESIGN: A cross-sectional survey mailed from July 2014 to January 2015 to 902 internists who completed residency between 2003 and 2013, randomly selected from the American Medical Association Masterfile. METHODS: Poisson regression was used to model the rate of recommending a targeted service included in the guidelines, based on the level of guideline adoption...
July 2017: American Journal of Managed Care
https://www.readbyqxmd.com/read/28817662/single-scan-rest-stress-imaging-with-99mtc-sestamibi-and-cadmium-zinc-telluride-based-spect-for-hyperemic-flow-quantification-a-feasibility-study-evaluated-with-cardiac-magnetic-resonance-imaging
#3
Yu-Hua Dean Fang, Yuan-Chang Liu, Kung-Chu Ho, Feng-Cheng Kuo, Ching-Fang Yang, Tzu-Chen Yen, I-Chang Hsieh
INTRODUCTION: We aimed to evaluate whether the hyperemic myocardial blood flow (MBF) can be estimated using cadmium zinc telluride (CZT)-based single-photon emission computed tomography (SPECT) cameras with a single, rapid rest/stress dynamic scan. Dynamic contrast-enhanced (DCE) cardiac magnetic resonance imaging (MRI) was used as a reference modality for flow measurement. MATERIALS AND METHODS: The proposed protocol included both the rest and stress acquisitions within a 24-min scan...
2017: PloS One
https://www.readbyqxmd.com/read/28817656/investigation-of-the-halo-artifact-in-68ga-psma-11-pet-mri
#4
Thorsten Heußer, Philipp Mann, Christopher M Rank, Martin Schäfer, Antonia Dimitrakopoulou-Strauss, Heinz-Peter Schlemmer, Boris A Hadaschik, Klaus Kopka, Peter Bachert, Marc Kachelrieß, Martin T Freitag
OBJECTIVES: Combined positron emission tomography (PET) and magnetic resonance imaging (MRI) targeting the prostate-specific membrane antigen (PSMA) with a 68Ga-labelled PSMA-analog (68Ga-PSMA-11) is discussed as a promising diagnostic method for patients with suspicion or history of prostate cancer. One potential drawback of this method are severe photopenic (halo-) artifacts surrounding the bladder and the kidneys in the scatter-corrected PET images, which have been reported to occur frequently in clinical practice...
2017: PloS One
https://www.readbyqxmd.com/read/28817417/brain-processing-of-the-temporal-dimension-of-acute-pain-in-short-term-memory
#5
Mina Khoshnejad, Mathieu Roy, Kristina Martinu, Jen-I Chen, Julien Cohen-Adad, Simon Grondin, Pierre Rainville
The dynamics of noxious sensation shapes pain perception, yet the memory of the temporal dimension of pain remains almost completely unexplored. Here, brain activity during the memory of pain duration was contrasted with that associated with the memory of pain intensity using functional magnetic resonance imaging (fMRI) and a delayed-reproduction task. Participants encoded, maintained during a short delay, and reproduced (1) the 'duration' of pain (i.e. onset-to-offset), (2) the 'dynamics' of pain (i.e. evolution of pain over time), or (3) the intensity of pain (i...
July 3, 2017: Pain
https://www.readbyqxmd.com/read/28817410/fatty-infiltrate-of-the-lumbar-multifidus-muscles-predicts-return-to-play-in-young-athletes-with-extension-based-low-back-pain
#6
John Winslow, Andrew Getzin, Hilary Greenberger, Walter Silbert
OBJECTIVE: To evaluate the predictive value of fatty infiltrate of the lumbar multifidus muscles (LMM) for return to play in young athletes with extension-based low back pain (EB LBP). DESIGN: Retrospective cohort study. SETTING: Hospital-based sports medicine practice. PATIENTS: Sixty-two athletes, 61.3% female, and 38.7% male, mean age 14.8 years, with a primary complaint of EB LBP who underwent magnetic resonance imaging (MRI); 46...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817305/foot-massage-touch-and-presence-in-decreasing-anxiety-during-a-magnetic-resonance-imaging-a-feasibility-study
#7
Rajni Parmar, Barbara B Brewer, Laura A Szalacha
OBJECTIVES: The purpose of the study was to determine (1) recruitment feasibility; (2) intervention adherence; (3) intervention acceptability; and (4) the preliminary effects of touch or foot massage interventions on anxiety during a magnetic resonance imaging (MRI). DESIGN: A quasi-experimental design was used. INTERVENTION: Foot massage and touch were the intervention groups and "presence" was the control group. SETTING: The study was conducted at the Center for Neurosciences, a freestanding facility, in southern Arizona...
August 17, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/28817216/functional-neuroimaging-after-severe-anoxic-brain-injury-in-children-may-reveal-preserved-yet-covert-cognitive-function
#8
Adrian M Owen
A growing body of evidence has confirmed that, after severe brain injury in adults, motoric and task-dependent factors that are essential for reliable communication, frequently interfere with an accurate assessment of cognitive status. In the current study, resting state functional magnetic resonance imaging (fMRI) in children who have sustained an anoxic brain injury following a near drowning incident suggests a similar pattern; preserved cognition amidst severe motoric impairment that effectively precludes accurate clinical diagnosis at the bedside...
August 17, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28816987/analysis-of-background-parenchymal-echogenicity-on-breast-ultrasound-correlation-with-mammographic-breast-density-and-background-parenchymal-enhancement-on-magnetic-resonance-imaging
#9
Kyung Hee Ko, Hae Kyoung Jung, Inwha Kim
The purpose of this study was to analyze the background parenchymal echotexture (BP echo) on breast ultrasound in detail and to evaluate the relation BP echo with menopausal status. In addition, we correlated BP echo with mammographic breast density (MGD) and background parenchymal enhancement (BPE) on magnetic resonance imaging (MRI).The institutional review board of our hospital approved this retrospective study, and the requirement of informed consent was waived. We studied 138 women (mean age 51.6 years, range from 26 to 79 years) with newly diagnosed invasive breast cancer, who had performed preoperative mammography, ultrasound, and MR from June 2013 to June 2015...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816961/estimating-of-hepatic-fat-amount-using-mri-proton-density-fat-fraction-in-a-real-practice-setting
#10
Hyeyoung Lee, Dae Won Jun, Bo-Kyeong Kang, Eunwoo Nam, Misoo Chang, Mimi Kim, Soonyoung Song, Byung Chul Yoon, Hang Lak Lee, Oh Young Lee, Ho Soon Choi, Kang Nyeong Lee
The recently developed magnetic resonance imaging (MRI) proton density fat fraction (PDFF) allows measurement of the fat in all segments of hepatic tissue. However, it is time consuming and inconvenient to measure each segment repeatedly. Moreover, volume of each segment also should be adjusted with arithmetic mean of the selected segments when total amount of liver fat is estimated. Therefore, we try to develop a clinically-relevant and applicable method of estimating hepatic fat in PDFF image.A total of 164 adults were enrolled...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816953/peritumoral-decreased-uptake-area-of-gadoxetic-acid-enhanced-magnetic-resonance-imaging-and-tumor-recurrence-after-surgical-resection-in-hepatocellular-carcinoma-a-strobe-compliant-article
#11
Seung Kak Shin, Yun Soo Kim, Young Sup Shim, Seung Joon Choi, So Hyun Park, Dong Hae Jung, Oh Sang Kwon, Duck Joo Choi, Ju Hyun Kim
Recently, it has been suggested that peritumoral decreased uptake area (PDUA) in the hepatobiliary phase (HBP) of gadoxetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI) was associated with vascular invasion in hepatocellular carcinoma (HCC). We aimed to investigate correlations between microvascular invasion and PDUA, and elucidate the predictability of PDUA for tumor recurrence after resection.We retrospectively analyzed clinicopathological and radiological data from 126 consecutive patients with single HCC ≤5 cm without macrovascular invasion who underwent preoperative Gd-EOB-DTPA-enhanced MRI and surgical resection...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816948/medial-medullary-infarction-caused-by-antineutrophil-cytoplasmic-antibody-related-vasculitis-case-report-and-review-of-the-literature
#12
Kumi Yanagiha, Kazuhiro Ishii, Tomoyuki Ueno, Aiki Marushima, Akira Tamaoka
RATIONALE: Medial medullary infarction accounts for less than 1% of brain infarctions, and medial medullary infarctions is very rarely caused by antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis. PATIENT CONCERNS: We report the case of a 76-year-old man at low risk of arteriosclerosis who presented with disorders on the left side including gaze-evoked nystagmus, paralysis of the extremities, pyramidal signs, sensory disturbance, and dysesthesia. Brain magnetic resonance imaging also showed right medial medullary infarction...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816947/kinematic-analysis-of-the-relationship-between-modic-changes-and-sagittal-balance-parameters-in-the-cervical-spine
#13
Zikun Ma, Peng Liu, Jingpei Liu, Jianhui Mou, Zhaolin Wang, Dong Sun, Jie Cheng, Dengwei Zhang, Jianlin Xiao
The aim of this study is to investigate the relationship between the Modic changes (MCs) and sagittal parameters of the cervical spine.We conducted a retrospective review of 100 outpatients with magnetic resonance imaging (MRI) scans of the cervical spine (50 male and 50 female). MRI parameters were measured, including neck tilt, T1 slope (T1 ), thoracic inlet angle (TIA), and cervical lordosis (CL: Cobb C2-7). Patients were divided into 4 groups according to the presence or absence of MC and T1s, respectively: MC(+) and MC(-) groups, as well as H-T1s (T1s ≥25°) and L-T1s subgroups (T1s <25°)...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816935/perimesencephalic-nonaneurysmal-subarachnoid-hemorrhage-caused-by-transverse-sinus-thrombosis-a-case-report-and-review-of-literature
#14
Fang-Wang Fu, Jie Rao, Yuan-Yuan Zheng, Liang Song, Wei Chen, Qi-Hui Zhou, Jian-Guang Yang, Jiang-Qiong Ke, Guo-Qing Zheng
RATIONALE: Perimesencephalic nonaneurysmal subarachnoid hemorrhage (PNSAH) is characterized by a pattern of extravasated blood restricted to the perimesencephalic cisterns, normal angiographic findings, and an excellent prognosis with an uneventful course and low risks of complication. The precise etiology of bleeding in patients with PNSAH has not yet been established. The most common hypothesis is that PNSAH is venous in origin. Intracranial venous hypertension has been considered as the pivotal factor in the pathogenesis of PNSAH...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816914/congenital-hypotonia-in-toddlerhood
#15
Naomi Steiner, Alcy Torres, Arathi Reddy, Marilyn Augustyn
David is a 22-month-old boy who is new to your practice. He recently moved from a rural area in the Midwest. His father is in the United States Air Force, and his mother works as a full-time homemaker. Their household includes 5 older siblings. The family moves every year because of the father's Air Force placement.David was born full-term in Virginia, with no reported pregnancy complications and no alcohol, tobacco, or drug exposure. He was delivered vaginally, with Apgar scores of 7 and 9, respectively and no respiratory issues...
August 9, 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28816897/surgical-correction-of-cam-deformity-in-association-with-femoroacetabular-impingement-and-its-impact-on-the-degenerative-process-within-the-hip-joint
#16
Paul E Beaulé, Andrew D Speirs, Helen Anwander, Gerd Melkus, Kawan Rakhra, Hanspeter Frei, Mario Lamontagne
BACKGROUND: Cam morphology in association with femoroacetabular impingement (FAI) is a recognized cause of hip pain and cartilage damage and proposed as a leading cause of arthritis. The purpose of this study was to analyze the functional and biomechanical effects of the surgical correction of the cam deformity on the degenerative process associated with FAI. METHODS: Ten male patients with a mean age of 34.3 years (range, 23.1 to 46.5 years) and a mean body mass index (and standard deviation) of 26...
August 16, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28816895/ten-year-multicenter-clinical-and-mri-evaluation-of-isolated-supraspinatus-repairs
#17
Philippe Collin, Jean-François Kempf, Daniel Mole Combining Acute Accent, Nicolas Meyer, Charles Agout, Mo Saffarini, Arnaud Godene Combining Grave Accent Che
BACKGROUND: Early repair of isolated supraspinatus tears could prevent further deterioration of the rotator cuff; however, there is no consensus on the management of such tears because of a lack of long-term outcome studies. The purposes of this study were to report the 10-year outcomes of isolated supraspinatus repairs and to investigate the factors that favor healing and recovery. METHODS: We retrieved the records of all 511 patients who, in 2003, underwent repair of full-thickness isolated supraspinatus tears, performed by 15 surgeons at 15 centers...
August 16, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28816879/atlas-fractures-and-atlas-osteosynthesis-a-comprehensive-narrative-review
#18
Frank Kandziora, Jens R Chapman, Alexander R Vaccaro, Gregory D Schroeder, Matti Scholz
Most atlas fractures are the result of compression forces. They are often combined with fractures of the axis and especially with the odontoid process. Multiple classification systems for atlas fractures have been described. For an adequate diagnosis, a computed tomography is mandatory. To distinguish between stable and unstable atlas injury, it is necessary to evaluate the integrity of the transverse atlantal ligament (TAL) by magnetic resonance imaging and to classify the TAL lesion. Studies comparing conservative and operative management of unstable atlas fractures are unfortunately not available in the literature; neither are studies comparing different operative treatment strategies...
September 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28816877/fractures-in-spinal-ankylosing-disorders-a-narrative-review-of-disease-and-injury-types-treatment-techniques-and-outcomes
#19
Tarush Rustagi, Doniel Drazin, Cumhur Oner, Jonathan York, Gregory D Schroeder, Alexander R Vaccaro, Rod J Oskouian, Jens R Chapman
INTRODUCTION: Spinal ankylosing disorders encompass ankylosing spondylitis (AS), disseminated hyperostosis of the spine, and end-stage spondylosis. All these result in a stiffened and frequently deformed spinal column. This makes the spinal column highly susceptible to severe injuries that are commonly associated with unfavorable outcomes. Improved understanding of the underlying disease processes and clinical comorbidities may alter the poor injury related morbidity and mortality outcomes...
September 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28816876/osteoporotic-thoracolumbar-fractures-how-are-they-different-classification-and-treatment-algorithm
#20
Shanmuganathan Rajasekaran, Rishi M Kanna, Klaus J Schnake, Alexander R Vaccaro, Gregory D Schroeder, Said Sadiqi, Cumhur Oner
Osteoporotic vertebral fractures constitute at least 50% of the osteoporotic fractures that happen worldwide. Occurrence of osteoporotic fractures make the elderly patient susceptible for further fractures and increases the morbidity due to kyphosis and pain; the mortality risk is also increased in these patients. Most fractures occur in the thoracic and thoracolumbar region and are often stable. Different descriptive and prognostic classification systems have been described, but none are universally accepted...
September 2017: Journal of Orthopaedic Trauma
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