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https://www.readbyqxmd.com/read/28537933/hypersensitivity-reactions-to-gadolinium-based-contrast-agents
#1
Jie Shen Fok, William B Smith
PURPOSE OF REVIEW: Gadolinium-based contrast agents (GBCAs) have been utilized since the late 1980s to enhance the diagnostic value of MRI studies. They are known to have excellent safety profile and serious adverse reactions are uncommon despite widespread global use. However, immediate hypersensitivity reactions are well described in the literature, with urticaria the most common manifestation. Anaphylaxis can occur, though fatality is extremely rare. This review explores the incidence of GBCA-related hypersensitivity reactions and highlights potential risk factors...
May 22, 2017: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28537753/radiologic-pathologic-correlation-for-benign-results-after-mri-guided-breast-biopsy
#2
Katharine D Maglione, Amie Y Lee, Kimberly M Ray, Bonnie N Joe, Ronald Balassanian
OBJECTIVE: The majority of MRI-guided breast biopsies yield benign pathology. The purpose of this article is to provide a comprehensive overview of benign pathologic entities commonly encountered at MRI-guided breast biopsy. CONCLUSION: Proper radiologic-pathologic correlation is an integral component of MRI-guided breast biopsy. Familiarity with the spectrum of MRI findings and key histopathologic features of common benign entities will enhance the radiologist's confidence in determining concordance and lead to improved patient management recommendations...
May 24, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28537752/imaging-features-of-spindle-cell-breast-lesions
#3
Andrew S Taliaferro, Valerie Fein-Zachary, Shambhavi Venkataraman, Tejas S Mehta, Amee Patel, Priscilla J Slanetz
OBJECTIVE: The purpose of our study is to review the clinical presentation, multimodality appearance, and management of the most common benign and malignant spindle cell lesions of the breast. CONCLUSION: Spindle cell lesions of the breast exhibit characteristic features at mammography, ultrasound, and MRI. Although a definitive diagnosis of these lesions cannot be made with diagnostic imaging alone, knowledge of their characteristic imaging features can assist in refining the differential diagnosis and guiding appropriate management...
May 24, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28535660/-clinical-investigation-on-ct-guided-cryoablation-for-treating-invasive-chest-wall-or-pleural-tumors
#4
M Wang, Y W Pan, Z G Zhou, Y Cui, K P Du, S Li
Objective: To evaluate the feasibility and short-term effect of CT guided cryoablation for malignant chest wall or pleural involvement. Methods: To follow up 22 patients with chest wall or pleural involvement of various malignancies who underwent cryoablation from January 2012 to January 2015 by conducting postoperative 1-, 3- and 6-month enhanced CT, MRI or PET-CT examinations, respectively, evaluate local curative effect, and observe their progression-free survival (PFS), postoperative pain remission and complications after the cryoablation...
May 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28534322/-value-of-functional-magnetic-resonance-imaging-in-predicting-outcomes-of-neoadjuvant-chemoradiotherapy-in-rectal-cancer
#5
Yishan Yu, Jinbo Yue, Jinming Yu
Rectal cancer is one of the common cancers which poses a threat to the health of mankind. In recent years. Multi-modality treatment strategies for locally advanced rectal cancer improve the treatment efficiency. Accurate prediction of the treatment response after the neoadjuvant chemoradiotherapy (CRT) can guide more suitable treatment strategy. MERCURY study proved the prognostic value of post-CRT standard morphologic MRI(T2-weighted) assessment of tumor regression grade(TRG), and MRI assessment of circumferential resection margin can guide the definitive surgery...
May 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28533806/second-salvage-high-dose-rate-brachytherapy-for-radiorecurrent-prostate-cancer
#6
Metha Maenhout, Marco van Vulpen, Marinus Moerland, Max Peters, Richard Meijer, Maurice van den Bosch, Paul Nguyen, Steven Frank, Jochem van der Voort van Zyp
PURPOSE: Salvage treatments for localized radiorecurrent prostate cancer can be performed safely when a focal and image guided approach is used. Due to the low toxicity, the opportunity exists to investigate a second salvage treatment when a second locally recurrent prostate cancer occurs. Here, we describe a second salvage treatment procedure of 4 patients. MATERIAL AND METHODS: Four patients with a pathologically proven second local recurrence were treated in an outpatient magnetic resonance imaging (MRI)-guided setting with a single fraction of 19 Gy focal high-dose-rate brachytherapy (HDR-BT)...
April 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/28533804/the-use-of-trans-applicator-intracavitary-ultrasonography-in-brachytherapy-for-cervical-cancer-phantom-study-of-a-novel-approach-to-3d-image-guided-brachytherapy
#7
Tomoaki Tamaki, Kazunori Miyaura, Toshihiro Murakami, Yu Kumazaki, Yoshiyuki Suzuki, Takashi Nakano, Shingo Kato
PURPOSE: To assess the feasibility of applying trans-applicator intracavitary ultrasonography to image-guided brachytherapy for cervical cancer. MATERIAL AND METHODS: For this experiment, a phantom was created and included a polyethylene tube, intended to simulate a tandem applicator, which was inserted into chicken meat and embedded in agar, along with magnetic resonance imaging (MRI)-compatible ovoid applicators. Three-dimensional images of the phantom were obtained using computed tomography (CT), MRI (T2-weighted), and intracavitary ultrasonography sectional images acquired at 1 mm slice intervals...
April 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/28533654/psma-expression-in-multinodular-thyroid-neoplasm-on-simultaneous-ga-68-psma-pet-mri
#8
Amarnath Jena, Shuaib Zaidi, Vikas Kashyap, Abhishek Jha, Sangeeta Taneja
PSMA PET is increasingly being used in imaging of recurrent prostate carcinoma. A case with suspected recurrent Prostate carcinoma (PCa), raised PSA (Prostate specific antigen) and suspected spinal metastases was referred for whole body Ga-68-PSMA PET/MRI. The study revealed PSMA avid recurrent prostate mass and extensive osseous metastases. Abnormal PSMA uptake in the thyroid gland prompted USG-guided FNAC which revealed Hurthle cell neoplasm. Histopathological examination (HPE) of excised gland showed multiple Hurthle cell adenomas in both lobes of thyroid along with foci of papillary thyroid carcinoma which on immunohistochemistry were thyroglobulin positive and PSA negative...
April 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/28529812/diabetic-muscle-infarction-masquerading-as-necrotizing-fasciitis
#9
Kalyana C Janga, Ankur Sinha, Perry Wengrofsky, Phone Oo, Sheldon Greenberg, Regina Tarkovsky, Kavita Sharma
A 43-year-old male patient with past medical history of diabetes mellitus (DM), end stage renal disease (ESRD) on hemodialysis (HD), congestive heart failure (CHF), obstructive sleep apnea (OSA), and chronic anemia presented with complaints of left thigh pain. A computerized tomogram (CT) of the thigh revealed evidence of edema with no evidence of a focal collection or gas formation noted. The patient's clinical symptoms persisted and he underwent magnetic resonance imaging (MRI) of his thigh which was reported to show small areas of muscle necrosis with fluid collection...
2017: Case Reports in Nephrology
https://www.readbyqxmd.com/read/28529640/lung-cancer-targeting-peptides-with-multi-subtype-indication-for-combinational-drug-delivery-and-molecular-imaging
#10
Yi-Hsuan Chi, Jong-Kai Hsiao, Ming-Huang Lin, Chen Chang, Chun-Hsin Lan, Han-Chung Wu
Lung cancer is the leading cause of cancer-related death worldwide. Most targeted drugs approved for lung cancer treatment are tyrosine kinase inhibitors (TKIs) directed against EGFR or ALK, and are used mainly for adenocarcinoma. At present, there is no effective or tailored targeting agent for large cell carcinoma (LCC) or small cell lung cancer (SCLC). Therefore, we aimed to identify targeting peptides with diagnostic and therapeutic utility that possess broad subtype specificity for SCLC and non-small cell lung cancer (NSCLC)...
2017: Theranostics
https://www.readbyqxmd.com/read/28528388/fertility-sparing-for-young-patients-with-gynecologic-cancer-how-mri-can-guide-patient-selection-prior-to-conservative-management
#11
REVIEW
Sinead H McEvoy, Stephanie Nougaret, Nadeem R Abu-Rustum, Hebert Alberto Vargas, Elizabeth A Sadowski, Christine O Menias, Fuki Shitano, Shinya Fujii, Ramon E Sosa, Joanna G Escalon, Evis Sala, Yulia Lakhman
Historically, cancer treatment has emphasized measures for the "cure" regardless of the long-term consequences. Advances in cancer detection and treatment have resulted in improved outcomes bringing to the fore various quality of life considerations including future fertility. For many young cancer patients, fertility preservation is now an integral component of clinical decision-making and treatment design. Optimal fertility-sparing options for young patients with gynecologic cancer are influenced by patient age, primary cancer, treatment regimens, and patient preferences...
May 20, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28522187/diffusion-weighted-mri-in-the-differential-diagnosis-of-parotid-malignancies-and-pleomorphic-adenomas-can-the-accuracy-of-dynamic-mri-be-enhanced
#12
Bogusław Mikaszewski, Karolina Markiet, Aneta Smugała, Dominik Stodulski, Edyta Szurowska, Czesław Stankiewicz
OBJECTIVES: (1) To verify whether appropriate selection of cutoff values for dynamic and diffusion-weighted magnetic resonance imaging (MRI) parameters optimizes the accuracy of preoperative differential diagnosis of parotid malignancies and pleomorphic adenomas. (2) To define the role of preoperative MRI in the differential diagnosis of parotid tumors. STUDY DESIGN: The retrospective analysis included 221 surgical patients with parotid tumors. Aside from ultrasonography-guided fine-needle biopsy, the preoperative protocol included dynamic and diffusion-weighted MRI...
March 15, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28521346/real-time-magnetic-resonance-imaging-guided-biopsy-using-smartframe%C3%A2-stereotaxis-in-the-setting-of-a-conventional-diagnostic-magnetic-resonance-imaging-suite
#13
Justin K Scheer, Thomas Hamelin, Leon Chang, Brian Lemkuil, Bob S Carter, Clark C Chen
BACKGROUND: Real-time magnetic resonance imaging (MRI) visualization during stereotactic needle biopsies affords several valuable benefits to the neurosurgeon, including the opportunity to visually confirm the biopsy site at the time of surgery. Until now, reported experiences with this technique have been limited to the setting of intraoperative MRI or dedicated procedural MRI suites with modified ventilation systems. OBJECTIVE: To describe our experience with 11 consecutive patients who underwent real-time MRI-guided biopsy performed using SmartFrame® stereotaxis (MRI Interventions, Irvine, California) in the setting of a conventional diagnostic MRI suite...
June 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28518114/preparation-and-in-vitro-characterization-of-magnetized-mir-modified-endothelial-cells
#14
Natalia Voronina, Heiko Lemcke, Frank Wiekhorst, Jens-Peter Kühn, Markus Frank, Gustav Steinhoff, Robert David
To date, the available surgical and pharmacological treatments for cardiovascular diseases (CVD) are limited and often palliative. At the same time, gene and cell therapies are highly promising alternative approaches for CVD treatment. However, the broad clinical application of gene therapy is greatly limited by the lack of suitable gene delivery systems. The development of appropriate gene delivery vectors can provide a solution to current challenges in cell therapy. In particular, existing drawbacks, such as limited efficiency and low cell retention in the injured organ, could be overcome by appropriate cell engineering (i...
May 2, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28516809/real-time-mri-guided-percutaneous-sclerotherapy-treatment-of-venous-low-flow-malformations-in-the-head-and-neck
#15
Sasan Partovi, Ziang Lu, Lorenna Vidal, Dean A Nakamoto, Ji Buethe, Michael Coffey, Indravadan J Patel
Purpose This manuscript describes the technique of real-time MRI-guided sclerotherapy for low-flow venous malformations in the head and neck based on our institutional experience. Materials and methods Ethanolamine oleate is used as the sclerosant and is mixed with gadolinium for visualization during the procedure. The five procedural steps include: (I) an initial tri-plane T2-weighted sequence to visualize the lesion; (II) a T1 FSE or trueFISP sequence to assess needle placement and advancement within the lesion; (III) a tri-plane T1 FLASH sequence to monitor sclerosant injection; (IV) a T1 FSE or VIBE sequence to assess sclerosant coverage of the malformation before needle removal; (V) a post-procedural tri-plane T1 fat-saturated sequence to confirm sclerosant coverage of the lesion...
January 1, 2017: Phlebology
https://www.readbyqxmd.com/read/28513855/technical-note-system-for-evaluating-local-hypothermia-as-a-radioprotector-of-the-rectum-in-a-small-animal-model
#16
Brian A Hrycushko, Chenchen Bing, Cecil Futch, Michelle Wodzak, Strahinja Stojadinovic, Paul M Medin, Rajiv Chopra
PURPOSE: The protective effects of induced or even accidental hypothermia on the human body are widespread with several medical uses currently under active research. In vitro experiments using human cell lines have shown hypothermia provides a radioprotective effect that becomes more pronounced at large, single-fraction doses common to stereotactic body radiotherapy (SBRT) and stereotactic radiosurgery (SRS) treatments. This work describes the development of a system to evaluate local hypothermia for a radioprotive effect of the rat rectum during a large dose of radiation relevant to prostate SBRT...
May 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28510905/zoomed-mri-guided-by-combined-eeg-meg-source-analysis-a-multimodal-approach-for-optimizing-presurgical-epilepsy-work-up-and-its-application-in-a-multi-focal-epilepsy-patient-case-study
#17
Ü Aydin, S Rampp, A Wollbrink, H Kugel, J -H Cho, T R Knösche, C Grova, J Wellmer, C H Wolters
In recent years, the use of source analysis based on electroencephalography (EEG) and magnetoencephalography (MEG) has gained considerable attention in presurgical epilepsy diagnosis. However, in many cases the source analysis alone is not used to tailor surgery unless the findings are confirmed by lesions, such as, e.g., cortical malformations in MRI. For many patients, the histology of tissue resected from MRI negative epilepsy shows small lesions, which indicates the need for more sensitive MR sequences...
May 16, 2017: Brain Topography
https://www.readbyqxmd.com/read/28509682/new-neurosurgical-approaches-for-tremor-and-parkinson-s-disease
#18
Alfonso Fasano, Andres M Lozano, Esther Cubo
PURPOSE OF REVIEW: The objective of this review is to gather the newest advances in the surgical treatment of tremor and Parkinson's disease. We will briefly discuss the potential applications of the new technologies of deep brain stimulation (DBS), and we will focus on MRI-guided focused ultrasound (MRgFUS). RECENT FINDINGS: Novel DBS devices are being progressively adopted, particularly electrodes allowing a longer stimulating surface (suitable for multiple targets stimulation) and current radial steering (to minimize side effects of stimulation)...
May 13, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28508759/mri-trus-fusion-for-electrode-positioning-during-irreversible-electroporation-for-treatment-of-prostate-cancer
#19
Alexander D J Baur, Federico Collettini, Judith Enders, Andreas Maxeiner, Vera Schreiter, Carsten Stephan, Bernhard Gebauer, Bernd Hamm, Thomas Fischer
We aimed to introduce an approach for image-guided positioning of electrodes for irreversible electroporation (IRE) in patients with prostate cancer using a magnetic resonance imaging-transrectal ultrasonography (MRI-TRUS) fusion technique. In 10 consecutive patients with biopsy-proven Gleason score ≤3+4 prostate cancer, 19 G electrodes were inserted into the prostate using a transperineal access. Magnetic resonance images of the prostate acquired before IRE were fused with transrectal ultrasound images acquired during IRE...
May 15, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28508635/polydopamine-coated-manganese-carbonate-nanoparticles-for-amplified-magnetic-resonance-imaging-guided-photothermal-therapy
#20
Youxing Cheng, Shupeng Zhang, Ning Kang, Jianpan Huang, Xiaolin Lv, Kai Wen, Shefang Ye, Zhiwei Chen, Xi Zhou, Lei Ren
This study reports a multifunctional nanoparticle (NP) that can be used for amplified magnetic resonance image (MRI)-guided photothermal therapy (PTT) due to its surface coating with a polydopamine (PDA) shell. Importantly, by means of introducing the surface coating of PDA, large quantities of water can be trapped around the NPs allowing more efficient water exchange, leading to greatly improved MR contrast signals compared with those from NPs without the PDA coating. Further, a distinct photothermal effect can be obtained arising from the strong absorption of PDA in the near-infrared (NIR) region...
May 23, 2017: ACS Applied Materials & Interfaces
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