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https://www.readbyqxmd.com/read/27933350/endoscopic-ear-surgery%C3%A2-a%C3%A2-complement-to-microscopic-ear-surgery
#1
S Preyer
Wullstein, the founder of modern microscopic ear surgery, already used an oto-endoscope intraoperatively. However, it is only after the recent development of modern video-endoscopy with high-definition, 4K, and 3‑dimensional imaging that endoscopically guided surgery of the middle ear is gaining some importance. Key ventilation routes like the isthmus tympani and the epitympanic diaphragm can be visualized far better using an endoscope than with a microscope. Going through the external meatus, surgery of middle ear pathologies is possible without external incision...
December 8, 2016: HNO
https://www.readbyqxmd.com/read/27932861/interactive-navigation-guided-ophthalmic-plastic-surgery-assessment-of-optical-versus-electromagnetic-modes-and-role-of-dynamic-reference-frame-location-using-navigation-enabled-human-skulls
#2
Mohammad Javed Ali, Milind N Naik, Chetan Mallikarjuniah Girish, Mohammad Hasnat Ali, Swathi Kaliki, Tarjani Vivek Dave, Gautam Dendukuri
AIM: The aim of this study was to assess the anatomical accuracy of navigation technology in localizing defined anatomic landmarks within the orbit with respect to type of technology (optical versus electromagnetic systems) and position of the dynamic reference marker on the skull (vertex, temporal, parietal, and mastoid) using in vitro navigation-enabled human skulls. The role of this model as a possible learning tool for anatomicoradiological correlations was also assessed. METHODS: Computed tomography (CT) scans were performed on three cadaveric human skulls using the standard image-guidance acquisition protocols...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27932686/computed-tomography-based-survey-of-the-vascular-anatomy-of-the-juvenile-g%C3%A3-ttingen-minipig
#3
J Siefert, K H Hillebrandt, M Kluge, D Geisel, P Podrabsky, T Denecke, M Nösser, J Gassner, A Reutzel-Selke, B Strücker, M H Morgul, S Guel-Klein, J K Unger, A Reske, J Pratschke, I M Sauer, N Raschzok
Over the past 50 years, image-guided procedures have been established for a wide range of applications. The development and clinical translation of new treatment regimens necessitate the availability of suitable animal models. The juvenile Göttingen minipig presents a favourable profile as a model for human infants. However, no information can be found regarding the vascular system of juvenile minipigs in the literature. Such information is imperative for planning the accessibility of target structures by catheterization...
December 8, 2016: Laboratory Animals
https://www.readbyqxmd.com/read/27932150/real-time-intraoperative-fluorescent-lymphography-a-new-technique-for-lymphatic-sparing-surgery
#4
G Ietto, F Amico, G Soldini, C Chiappa, M Franchin, D Iovino, A Romanzi, G Saredi, E Cassinotti, L Boni, M Tozzi, G Carcano
BACKGROUND: Many surgical procedures can produce persistent lymphorrhea, lymphoceles, and lymphedema after lymph node and lymph vessel damage. Appropriate visualization of the lymphatic system is challenging. Indocyanine green (ICG) is a well-known nontoxic dye for lymphatic flow evaluation. ICG fluorescence-guided lymphography has emerged as a promising technique for intraoperative lymphatic mapping. OBJECTIVE: Our goal was to develop a high spatial resolution, real-time intraoperative imaging technique to avoid or recognize early deep lymphatic vessel damage...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27931965/musculoskeletal-interventional-procedures-with-or-without-imaging-guidance
#5
REVIEW
David Kane, Juhani Koski
Aspiration and injection of joints and soft tissues is an indispensable skill used in everyday practice by the clinical rheumatologist. Most rheumatologists recognise that performing these procedures using anatomical landmarks is not always successful, particularly in the case of small or infrequently injected joints, bursae or tendon sheaths. Musculoskeletal ultrasound confirms the local pathological-anatomical diagnosis and is the most applicable and feasible imaging method that can be applied in clinical practice in guiding musculoskeletal interventional procedures...
August 2016: Best Practice & Research. Clinical Rheumatology
https://www.readbyqxmd.com/read/27931840/quality-indicators-in-the-intensity-modulated-image-guided-radiotherapy-era
#6
REVIEW
P Gabriele, A Maggio, E Garibaldi, C Bracco, E Delmastro, D Gabriele, A Rosi, F Munoz, N Di Muzio, R Corvò, M Stasi
PURPOSE: To propose new Quality Indicators (QIs) for the Intensity Modulated(IMRT)/Image-Guided(IGRT) Radiotherapy techniques. MATERIALS AND METHODS: Two structure, 10 process and 2 outcome QIs were elaborated. A working group including Radiation Oncologist, Medical Physicist and Radiation Technologists was made up. A preliminary set of indicators was selected on the basis of evidenced critical issues; the criteria to identify more relevant and specific QIs for IMRT/IGRT were defined; structure, process and outcome QIs were defined...
December 2016: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/27930527/feasibility-of-radiofrequency-ablation-as-an-alternative-to-surgical-intervention-in-patients-with-huge-multiloculated-pyogenic-liver-abscesses-a-retrospective-cohort-study
#7
Shan Ke, Xue-Mei Ding, Jun Gao, Shao-Hong Wang, Jian Kong, Li Xu, Wen-Bing Sun
This retrospective cohort study investigated the feasibility of radiofrequency (RF) ablation as an alternative to surgical intervention in patients with huge multiloculated pyogenic liver abscesses (PLAs).From August 2010 to April 2016, 83 patients with PLA were admitted to Beijing Chao-Yang Hospital, China. Four of these patients had huge multiloculated PLAs and underwent RF ablation plus antibiotics. The inclusion criteria for RF ablation were as follows: multiloculated PLA confirmed by computed tomography (CT) or magnetic resonance imaging (MRI), widest diameter of the PLA ≥5 cm, failure to respond to or not suitable to treatment with percutaneous drainage (PD), and patient refusal of surgery...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27929675/imaging-surveillance-in-patients-after-a-benign-fine-needle-aspiration-biopsy-of-the-thyroid-associated-cost-and-incidence-of-subsequent-cancer
#8
David J S Becker-Weidman, Neil Malhotra, David F Reilly, Naveen Selvam, Laurence Parker, Levon N Nazarian
OBJECTIVE: The objective of our study was to determine patterns and cost of imaging tumor surveillance in patients after a benign fine-needle aspiration (FNA) biopsy of the thyroid in a large teaching hospital as well as the rate of subsequent cancer detection. MATERIALS AND METHODS: This cohort study was approved by the appropriate institutional review board and complied with HIPAA. All patients who had a benign thyroid FNA biopsy between January 1, 1999, and December 31, 2003, were identified from an institutional pathology database...
December 8, 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/27929487/comparison-of-liver-volumetry-on-contrast-enhanced-ct-images-one-semiautomatic-and-two-automatic-approaches
#9
Wei Cai, Baochun He, Yingfang Fan, Chihua Fang, Fucang Jia
This study was to evaluate the accuracy, consistency, and efficiency of three liver volumetry methods- one interactive method, an in-house-developed 3D medical Image Analysis (3DMIA) system, one automatic active shape model (ASM)-based segmentation, and one automatic probabilistic atlas (PA)-guided segmentation method on clinical contrast-enhanced CT images. Forty-two datasets, including 27 normal liver and 15 space-occupying liver lesion patients, were retrospectively included in this study. The three methods - one semiautomatic 3DMIA, one automatic ASM-based, and one automatic PA-based liver volumetry - achieved an accuracy with VD (volume difference) of -1...
November 8, 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/27929486/dosimetric-and-volumetric-changes-in-the-rectum-and-bladder-in-patients-receiving-cbct-guided-prostate-imrt-analysis-based-on-daily-cbct-dose-calculation
#10
David Pearson, Sukhdeep K Gill, Nina Campbell, Krishna Reddy
Delivered dose can be calculated by transferring the planned treatment beams onto the daily CBCT. Bladder and rectum volumetric doses were calculated and cor-related to the daily bladder and rectum fullness. Patients for this study underwent hypofractionated prostate IMRT to 70 Gy in 28 fractions. Daily CBCT was utilized for image guidance. A clinically acceptable plan was created using a CTV-to-PTV uniform margin of 5 mm. Image fusion was performed to transfer the bladder and rectum contours onto each CBCT...
November 8, 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/27929277/acute-monoarthritis-diagnosis-in-adults
#11
Jonathan A Becker, Jennifer P Daily, Katherine M Pohlgeers
Acute monoarthritis can be the initial manifestation of many joint disorders. The most common diagnoses in the primary care setting are osteoarthritis, gout, and trauma. It is important to understand the prevalence of specific etiologies and to use the appropriate diagnostic modalities. A delay in diagnosis and treatment, particularly in septic arthritis, can have catastrophic results including sepsis, bacteremia, joint destruction, or death. The history and physical examination can help guide the use of laboratory and imaging studies...
November 15, 2016: American Family Physician
https://www.readbyqxmd.com/read/27928626/comparison-of-prostate-positioning-guided-by-three-dimensional-transperineal-ultrasound-and-cone-beam-ct
#12
Minglun Li, Hendrik Ballhausen, Nina-Sophie Hegemann, Michael Reiner, Stefan Tritschler, Christian Gratzke, Farkhad Manapov, Stefanie Corradini, Ute Ganswindt, Claus Belka
OBJECTIVE: The accuracy of a transperineal three-dimensional ultrasound system (3DUS) was assessed for prostate positioning and compared to fiducial- and bone-based positioning in kV cone beam computed tomography (CBCT) during definitive radiotherapy of prostate cancer. METHODS: Each of the 7 patients had three fiducial markers implanted into the prostate before treatment. Prostate positioning was simultaneously measured by 3DUS and CBCT before each fraction. In total, 177 pairs of 3DUS and CBCT scans were collected...
December 7, 2016: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/27927235/stereoscopic-x-ray-imaging-cone-beam-ct-and-couch-positioning-in-stereotactic-radiotherapy-of-intracranial-tumors-preliminary-results-from-a-cross-modality-pilot-installation
#13
Barbara Zollner, Christian Heinz, Sabrina Pitzler, Farkhad Manapov, Steffi Kantz, Maya Christine Rottler, Maximilian Niyazi, Ute Ganswindt, Claus Belka, Hendrik Ballhausen
BACKGROUND: To assess the accuracy and precision of a fully integrated pilot installation of stereoscopic X-ray imaging and kV-CBCT for automatic couch positioning in stereotactic radiotherapy of intracranial tumors. Positioning errors as detected by stereoscopic X-ray imaging are compared to those by kV-CBCT (i.e. the accuracy of the new method is verified by the established method), and repeated X-ray images are compared (i.e. the precision of new method is determined intra-modally)...
December 7, 2016: Radiation Oncology
https://www.readbyqxmd.com/read/27926784/preoperative-characteristics-and-cytological-features-of-136-histologically-confirmed-pancreatic-mucinous-cystic-neoplasms
#14
Aristana Scourtas, Jonathan C Dudley, William R Brugge, Abdurrahman Kadayifci, Mari Mino-Kenudson, Martha B Pitman
BACKGROUND: Mucinous cystic neoplasms (MCNs) of the pancreas present a management conundrum. The majority are benign but all are resected due to their malignant potential. Recent studies have recommended nonsurgical management. In the current study, the authors analyzed the preoperative imaging, cytology, and cyst fluid characteristics of 136 histologically confirmed MCNs to assess predictors of a high-risk (HR) cyst for surgical triage. METHODS: MCNs resected at the Massachusetts General Hospital between 1990 and 2014 formed the study cohort...
December 7, 2016: Cancer
https://www.readbyqxmd.com/read/27925701/effect-of-precompression-on-the-power-doppler-assessment-of-breast-lesion-vascularity
#15
Robert DeVita, Richard G Barr
OBJECTIVES: To evaluate the effect of precompression on power Doppler visualization of blood flow in breast masses. METHODS: This Institutional Review Board-approved and Health Insurance Portability and Accountability Act-compliant study evaluated 30 patients with breast masses (16 benign and 14 malignant) undergoing ultrasound-guided breast biopsy. A computational mathematics program was used to calculate the number of color pixels in a region of interest at various degrees of compression of the breast by the transducer...
November 30, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27925472/image-guided-radiotherapy-for-prostate-cancer-in-the-united-kingdom-a-national-survey
#16
Hemal Ariyaratne, Hayley Chesham, Roberto Alonzi
OBJECTIVES: To survey the technology and practice of image-guided radiotherapy for prostate cancer in the United Kingdom Methods: A pre-tested semi-structured online questionnaire was sent to NHS and private radiotherapy providers in the United Kingdom between March and April 2014. The survey was carried out on the Opinio© online platform. RESULTS: There was a high survey response rate of 83%. There is widespread use of intensity-modulated radiotherapy and advanced verification imaging modalities...
December 7, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27925038/image-guided-pancreatic-biopsy-can-we-trust-it-as-a-diagnostic-alternative
#17
Thiago Queroz, Wanderley Marques Bernardo, Marcos Roberto de Menezes
No abstract text is available yet for this article.
October 2016: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/27924360/perfusion-imaging-of-brain-gliomas-using-arterial-spin-labeling-correlation-with-histopathological-vascular-density-in-mri-guided-biopsies
#18
Di Ningning, Pang Haopeng, Dang Xuefei, Cheng Wenna, Ren Yan, Wu Jingsong, Yao Chengjun, Yao Zhenwei, Feng Xiaoyuan
INTRODUCTION: This study was designed to determine if cerebral blood flow (CBF) derived from arterial spin labeling (ASL) perfusion imaging could be used to quantitatively evaluate the microvascular density (MVD) of brain gliomas on a "point-to-point" basis by matching CBF areas and surgical biopsy sites as accurate as possible. METHODS: The study enrolled 47 patients with treatment-naive brain gliomas who underwent preoperative ASL, 3D T1-weighted imaging with gadolinium contrast enhancement (3D T1C+), and T2 fluid acquisition of inversion recovery (T2FLAIR) sequences before stereotactic surgery...
December 6, 2016: Neuroradiology
https://www.readbyqxmd.com/read/27924199/in-plane-three-step-needle-insertion-technique-for-ultrasound-guided-continuous-femoral-nerve-block-after-total-knee-arthroplasty-a-retrospective-review-of-488-cases
#19
Hyeon Ju Shin, Jung Sub Soh, Hyong Hwan Lim, Bumjoon Joo, Hye Won Lee, Hae Ja Lim
BACKGROUND: Continuous femoral nerve block (CFNB) improves postoperative analgesia after total knee arthroplasty (TKA). The aim of this study was to investigate the clinical efficacy and complications of our in-plane three-step needle insertion technique that was devised to reduce the risk of direct femoral nerve injury during CFNB in anesthetized patients. METHODS: This retrospective study included 488 patients who had undergone TKA. Ultrasound (US)-guided CFNB was performed under general or spinal anesthesia using an in-plane, three-step needle insertion technique...
December 2016: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/27924162/a-pretargeted-approach-for-the-multimodal-pet-nirf-imaging-of-colorectal-cancer
#20
Pierre Adumeau, Kathryn E Carnazza, Christian Brand, Sean D Carlin, Thomas Reiner, Brian J Agnew, Jason S Lewis, Brian M Zeglis
The complementary nature of positron emission tomography (PET) and near-infrared fluorescence (NIRF) imaging makes the development of strategies for the multimodal PET/NIRF imaging of cancer a very enticing prospect. Indeed, in the context of colorectal cancer, a single multimodal PET/NIRF imaging agent could be used to stage the disease, identify candidates for surgical intervention, and facilitate the image-guided resection of the disease. While antibodies have proven to be highly effective vectors for the delivery of radioisotopes and fluorophores to malignant tissues, the use of radioimmunoconjugates labeled with long-lived nuclides such as (89)Zr poses two important clinical complications: high radiation doses to the patient and the need for significant lag time between imaging and surgery...
2016: Theranostics
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