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https://www.readbyqxmd.com/read/28927206/preoperative-magnetic-resonance-and-intraoperative-computed-tomography-fusion-for-real-time-neuronavigation-in-intramedullary-lesion-surgery
#1
Francesco Costa, Alessandro Ortolina, Andrea Cardia, Marco Riva, Martina Revay, Guido Pecchioli, Carla Daniela Anania, Francesco Asteggiano, Maurizio Fornari
BACKGROUND: Image-guided surgery techniques in spinal surgery are usually based upon fluoroscopy or computed tomography (CT) scan, which allow for a real-time navigation of bony structures, though not of neural structures and soft tissue remains. OBJECTIVE: To verify the effectiveness and efficacy of a novel technique of imaging merging between preoperative magnetic resonance imaging (MRI) and intraoperative CT scan during removal of intramedullary lesions. METHODS: Ten consecutive patients were treated for intramedullary lesions using a navigation system aid...
April 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28927093/detailed-analysis-of-a-superficial-cd34-positive-fibroblastic-tumor-a-case-report-and-review-of-the-literature
#2
Kensaku Yamaga, Akihiro Fujita, Mari Osaki, Satoshi Kuwamoto, Naoko Ishiguro, Tadahito Yamamoto, Hideki Nagashima
Superficial cluster of differentiation (CD)34-positive fibroblastic tumor (SCPFT) is a rare mesenchymal neoplasm of borderline malignancy. It is characterized by a superficial location, marked cellular pleomorphism, an extremely low incidence of mitotic figures, and strong CD34 immunohistochemical positivity. As SCPFT is a recently described neoplasm, its characteristics are yet to be fully elucidated. To the best of our knowledge, no detailed studies regarding the imaging findings and cytogenetic analyses of SCPFTs exist...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927030/implementation-of-diffusion-weighted-magnetic-resonance-imaging-in-target-delineation-of-central-lung-cancer-accompanied-with-atelectasis-in-precision-radiotherapy
#3
Xinli Zhang, Zheng Fu, Guanzhong Gong, Hong Wei, Jinghao Duan, Zhaoqiu Chen, Xiangming Chen, Ruozheng Wang, Yong Yin
Radiotherapy, particularly the target delineation of cancer based on scanned images, plays a key role in the planning of cancer treatment. Recently, diffusion-weighted magnetic resonance imaging (DW-MRI) has emerged as a prospective superior procedure compared with intensified computed tomography (CT) and positron emission tomography (PET) in the target delineation of cancer. However, the implication of DW-MRI in lung cancer, the leading cause of cancer-associated mortality worldwide, has not been extensively evaluated...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28926610/image-similarity-evaluation-of-the-bulk-density-assigned-synthetic-ct-derived-from-mri-of-intracranial-regions-for-radiation-treatment
#4
Shin-Wook Kim, Hun-Joo Shin, Jin-Ho Hwang, Jin-Sol Shin, Sung-Kwang Park, Jin-Young Kim, Ki-Jun Kim, Chul-Seung Kay, Young-Nam Kang
OBJECTIVE: Various methods for radiation-dose calculation have been investigated over previous decades, focusing on the use of magnetic resonance imaging (MRI) only. The bulk-density-assignment method based on manual segmentation has exhibited promising results compared to dose-calculation with computed tomography (CT). However, this method cannot be easily implemented in clinical practice due to its time-consuming nature. Therefore, we investigated an automatic anatomy segmentation method with the intention of providing the proper methodology to evaluate synthetic CT images for a radiation-dose calculation based on MR images...
2017: PloS One
https://www.readbyqxmd.com/read/28924922/assessing-the-non-tumorous-liver-implications-for-patient-management-and-surgical-therapy
#5
Pallavi Pandey, Ankur Pandey, Mary Dillhoff, Carl Schmidt, Ihab R Kamel, Timothy M Pawlik
INTRODUCTION: Hepatic resection is performed for various benign and malignant liver tumors. Over the last several decades, there have been improvements in the surgical technique and postoperative care of patients undergoing liver surgery. Despite this, liver failure following an extended hepatic resection remains a critical potential postoperative complication. Patients with underlying parenchymal liver diseases are at particular risk of liver failure due to impaired liver regeneration with an associated mortality risk as high as 60 to 90%...
September 18, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28923412/image-guided-tandem-and-cylinder-brachytherapy-as-monotherapy-for-definitive-treatment-of-inoperable-endometrial-carcinoma
#6
Brian Gebhardt, Beant Gill, Scott Glaser, Hayeon Kim, Chris Houser, Joseph Kelley, Paniti Sukumvanich, Robert Edwards, John Comerci, Alexander Olawaiye, Madeleine Courtney-Brooks, Michelle Boisen, Jessica Berger, Sushil Beriwal
OBJECTIVES: Management of endometrial cancer consists of surgical staging with adjuvant therapy guided by risk factors, though some women cannot undergo surgery due to comorbidities. We present a series of women treated with definitive high-dose rate image-guided tandem and cylinder brachytherapy (HDR-IGBT) alone. METHODS: Patients with grade 1-2, clinical stage I endometrial adenocarcinoma, <50% myometrial invasion, and tumor≤2cm were reviewed. Definitive treatment consisted of 5-6 fractions HDR-IGBT alone with CT- or MRI-based planning...
September 15, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28923299/masson-s-tumor-revealed-by-an-intracerebral-hematoma-case-report-and-a-review-of-the-literature
#7
C Salaud, D Loussouarn, K Buffenoir, T Riem
We report the case of a 56-year-old woman who underwent total resection of a Masson's tumor or intravascular papillary endothelial hyperplasia (IPEH), which was discovered due to a left temporal intracerebral hematoma revealed by aphasia. IPEH is more often localized on cutaneous and subcutaneous locations, intracranial IPEH are rare and only approximately twenty cases have been published to date. These tumors are a benign vascular lesion composed of papillary intravascular proliferation of epithelial cellular associated thrombosis with fibrin deposits responsible for vascular lumen obliteration...
September 15, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28921047/child-dermoid-cyst-mimicking-a-craniopharyngioma-the-benefit-of-mri-t2-weighted-diffusion-sequence
#8
Aymeric Amelot, Alin Borha, Raphael Calmon, Patrick Barbet, Stephanie Puget
BACKGROUND: Brain dermoid cysts are very rare lesions. Although benign, these cysts may be associated with devastating complications due to mass effect or meningitis. The discovery of completely asymptomatic dermoid cysts in the pediatric population is exceedingly rare. Despite the advances in imaging modalities, it sometimes remains difficult to exclude the differential diagnosis of craniopharyngioma. CASE REPORT: We describe a 12-year-old boy addressed for suspicion of craniopharyngioma diagnosed by decreased visual acuity, bitemporal hemianopia and a CT scan showing a large hypodense suprasellar lesion with intralesional calcifications...
September 18, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28920107/supporting-families-in-reviewing-and-communicating-about-radiology-imaging-studies
#9
Matthew K Hong, Clayton Feustel, Meeshu Agnihotri, Max Silverman, Stephen F Simoneaux, Lauren Wilcox
Diagnostic radiology reports are increasingly being made available to patients and their family members. However, these reports are not typically comprehensible to lay recipients, impeding effective communication about report findings. In this paper, we present three studies informing the design of a prototype to foster patient-clinician communication about radiology report content. First, analysis of questions posted in online health forums helped us identify patients' information needs. Findings from an elicitation study with seven radiologists provided necessary domain knowledge to guide prototype design...
May 2, 2017: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
https://www.readbyqxmd.com/read/28919265/pretherapeutic-staging-of-locally-advanced-cervical-cancer-inframesenteric-paraaortic-lymphadenectomy-accuracy-to-detect-paraaortic-metastases-in-comparison-with-infrarenal-paraaortic-lymphadenectomy
#10
Henri Azaïs, Louise Ghesquière, Clothilde Petitnicolas, Yves Borghesi, Emmanuelle Tresch-Bruneel, Abel Cordoba, Fabrice Narducci, Lucie Bresson, Eric Leblanc
BACKGROUND: Extended-field chemoradiation therapy is usually performed in patients with locally advanced cervical cancer (LACC) and paraaortic (PA) node metastases. Considering the very low rate of skip metastases above inferior mesenteric artery, ilio-inframesenteric paraaortic lymph node dissection (IM-PALND) seems to be an adequate pattern of PALND. Our objective was to assess the accuracy of this management to determine PA nodal status in comparison with infrarenal paraaortic lymphadenectomy (IR-PALND) in case of squamous or glandular cervical cancer...
September 14, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28919003/inter-observer-agreement-in-gtv-delineation-of-bone-metastases-on-ct-and-impact-of-mr-imaging-a-multicenter-study
#11
A S Gerlich, J M van der Velden, A N T J Kotte, C L Tseng, G Fanetti, W S C Eppinga, N Kasperts, M P W Intven, F A Pameijer, M E P Philippens, H M Verkooijen, E Seravalli
BACKGROUND AND PURPOSE: The use of Stereotactic Body Radiotherapy (SBRT) for bone metastases is increasing rapidly. Therefore, knowledge of the inter-observer differences in tumor volume delineation is essential to guarantee precise dose delivery. The aim of this study is to compare inter-observer agreement in bone metastases delineated on different imaging modalities. MATERIAL AND METHODS: Twenty consecutive patients with bone metastases treated with SBRT were selected...
September 14, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28918564/mri-combined-with-pet-ct-of-different-tracers-to-improve-the-accuracy-of-glioma-diagnosis-a-systematic-review-and-meta-analysis
#12
REVIEW
Yihan Yang, Mike Z He, Tao Li, Xuejun Yang
Based on studies focusing on positron emission tomography (PET)-computed tomography (CT) combined with magnetic resonance imaging (MRI) in the diagnosis of glioma, we conducted a systematic review and meta-analysis evaluating the pros and cons and the accuracy of different examinations. PubMed and Cochrane Library were searched. The search was conducted until April 2017. Two reviewers independently conducted the literature search according to the criteria set initially. Based on the exclusion criteria, 15 articles are included in this study...
September 16, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28918316/mr-guided-joint-reconstruction-of-activity-and-attenuation-in-brain-pet-mr
#13
Abolfazl Mehranian, Habib Zaidi, Andrew J Reader
With the advent of time-of-flight (TOF) PET scanners, joint maximum-likelihood reconstruction of activity and attenuation (MLAA) maps has recently regained attention for the estimation of PET attenuation maps from emission data. However, the estimated attenuation and activity maps are scaled by unknown scaling factors. We recently demonstrated that in hybrid PET-MR, the scaling issue of this algorithm can be effectively addressed by imposing MR spatial constraints on the estimation of attenuation maps using a penalized MLAA (P-MLAA(+)) algorithm...
September 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28917660/stereotaxic-18-f-fdg-pet-and-mri-templates-with-three-dimensional-digital-atlas-for-statistical-parametric-mapping-analysis-of-tree-shrew-brain
#14
Qi Huang, Binbin Nie, Chen Ma, Jing Wang, Tianhao Zhang, Shaofeng Duan, Shang Wu, Shengxiang Liang, Panlong Li, Hua Liu, Hua Sun, Jiangning Zhou, Lin Xu, Baoci Shan
BACKGROUND: Tree shrews are proposed as an alternative animal model to nonhuman primates due to their close affinity to primates. Neuroimaging techniques are widely used to study brain functions and structures of humans and animals. However, tree shrews are rarely applied in neuroimaging field partly due to the lack of available species specific analysis methods. NEW METHOD: In this study, 10 PET/CT and 10 MRI images of tree shrew brain were used to construct PET and MRI templates; based on histological atlas we reconstructed a three-dimensional digital atlas with 628 structures delineated; then the digital atlas and templates were aligned into a stereotaxic space...
September 13, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28917250/emerging-technologies-in-stereotactic-body-radiotherapy
#15
Lijun Ma, Lei Wang, Chia-Lin Tseng, Arjun Sahgal
Stereotactic body radiation therapy (SBRT) stems from the initial developments of intra-cranial stereotactic radiosurgery (SRS). Despite similarity in their names and clinical goals of delivering a sufficiently high tumoricidal dose, maximal sparing of the surrounding normal tissues and a short treatment course, SBRT technologies have transformed from the early days of body frame-based treatments with X-ray verification to primarily image-guided procedures with cone-beam CT or stereoscopic X-ray systems and non-rigid body immo-bilization...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28916887/appropriate-imaging-utilization-in-japan-a-survey-of-accredited-radiology-training-hospitals
#16
Kanako K Kumamaru, Sadayuki Murayama, Yasuyuki Yamashita, Takeshi Nojo, Yoshiyuki Watanabe, Mariko Goto, Eriko Maeda, Junko Echigo, Shigeyoshi Soga, Shinya Fujii, Yutaka Tanami, Tetsuhiko Okabe, Masahiro Okada, Jiro Munechika, Hideki Ota, Mototaka Miyake, Hiroshi Honda, Shigeki Aoki
PURPOSE: To survey whether imaging is being performed appropriately in Japan, and to survey whether radiologists intervene to ensure imaging requests are appropriate. METHODS: An online survey was sent to radiologists at accredited radiology training hospitals. The survey included the radiologists' perspectives on whether imaging is performed appropriately at their institutions and whether they intervene if the indication for imaging is inappropriate/ambiguous. RESULTS: The response rate was 87...
September 15, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28916623/efficacy-of-radioembolization-with-holmium-166-microspheres-in-salvage-patients-with-liver-metastases-a-phase-2-study
#17
Jip F Prince, Maurice A A J van den Bosch, J F W Nijsen, Maarten L J Smits, Andor F van den Hoven, Stavros Nikolakopoulos, Frank J Wessels, Rutger C G Bruijnen, Manon Braat, Bernard A Zonnenberg, Marnix Lam
Rationale: Radioembolization of liver malignancies with holmium-166 (166Ho) microspheres has been shown safe in a phase 1 dose-escalation study. The purpose of this study was to investigate the efficacy of 166Ho radioembolization. Methods: In this prospective single-arm study, 56 patients were enrolled, all with liver metastases refractory to systemic therapy and ineligible for surgical resection. Radioembolization was performed with a projected average absorbed dose of 60 Gy to the liver (equal to 3.8 GBq/kg liver tissue)...
September 15, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28916177/quantifying-the-impact-of-noninterpretive-tasks-on-radiology-report-turn-around-times
#18
McKinley Glover, Renata R Almeida, Pamela W Schaefer, Michael J Lev, William A Mehan
PURPOSE: Traditional radiology productivity metrics do not account for noninterpretive tasks (NITs). This study aimed to systematically quantify NITs and their impact on report turn-around time (RTAT) during solo academic neuroradiology overnight coverage in the emergency department. METHODS: Retrospective analysis of 1 week of data, including phone call quantity and duration, clinician identification badge access to the reading room ("badge swipes"), suspected acute strokes, imaging examination volume, and emergency department patient volume, was performed...
September 13, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28916167/structural-neuroimaging-in-sport-related-concussion
#19
Erin D Bigler
Structural neuroimaging of athletes who have sustained a sports-related concussion (SRC) can be viewed as either standard clinical imaging or with advanced neuroimaging methods that quantitatively assess brain structure. Negative findings from conventional computed tomography (CT) or magnetic resonance imaging (MRI) are the norm in SRC. Nonetheless, these conventional measures remain the first line of neuroimaging of the athlete as they do detect clinically significant pathologies, when present, such as hemorrhagic abnormalities in the form of hematomas, contusions and mircobleeds along with regions of focal encephalomalacia or other signal abnormalities, with CT best capable of detecting skull fractures...
September 12, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28913298/the-unnecessity-of-positron-emission-tomography-computed-tomography-in-the-etiologic-evaluation-of-neurodevelopmental-delay-in-craniosynostosis-patients
#20
Chae Eun Yang, Eun Kyung Park, Myung Chul Lee, Kyu Won Shim, Yong Oock Kim
BACKGROUND: In evaluation of craniosynostosis patients in terms of neurodevelopmental delay, positron emission tomography computed tomography (PET-CT) scan can be used to assess brain abnormalities through glucose metabolism. We aimed to determine the unnecessity of PET-CT in this study. METHODS: Thirty-eight patients diagnosed with craniosynostosis who underwent distraction osteogenesis from October, 2010 to November, 2013 were reviewed. Magnetic resonance imaging (MRI) and PET-CT scan were carried out for evaluation of the brain structure and function, whereas X-ray and CT scan were taken for evaluation of the skull...
March 2017: Arch Craniofac Surg
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