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https://www.readbyqxmd.com/read/28338309/impact-of-personalized-three-dimensional-3d-printed-pelvicalyceal-system-models-on-patient-information-in-percutaneous-nephrolithotripsy-surgery-a-pilot-study
#1
Hasan Anil Atalay, H Lütfi Canat, Volkan Ülker, İlter Alkan, Ünsal Özkuvanci, Fatih Altunrende
OBJECTIVE: To investigate the impact of personalized three dimensional (3D) printed pelvicalyceal system models on patient information before percutaneous nephrolithotripsy surgery. MATERIAL AND METHODS: Patients with unilateral complex renal stones with indicatation of percutaneous nephrolithotripsy surgery were selected. Usable data of patients were obtained from CT scans as Digital Imaging and Communications in Medicine (DICOM) format. Mimics software version 16...
March 24, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/28338085/morphometric-analysis-of-sinus-depth-in-the-posterior-maxilla-and-proposal-of-a-novel-classification
#2
Florian Wagner, Gabriella Dvorak, Stefan Nemec, Peter Pietschmann, Hannes Traxler, Kurt Schicho, Rudolf Seemann
The aim of this study was to analyse the posterior maxillary sinus based on its extension into the alveolar process and to provide a simple clinical classification. A retrospective cohort study was conducted in CT scans of 200 dentate and 200 edentulous patients (100 women and 100 men, respectively). After manual placement of 12 reference points morphometric analysis was performed and sinus depth, residual alveolar ridge height (RH) and the sinus opening angle were calculated. Sinuses were classified according to the quartiles of sinus depth: class I (above the hard palate), class II (0-6 mm below the hard palate) and class III (>6 mm below the hard palate)...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28335897/mitral-loop-cerclage-annuloplasty-for-secondary-mitral-regurgitation-first-human-results
#3
Yong-Hyun Park, Min-Ku Chon, Robert J Lederman, Si-Chan Sung, Hyung-Gon Je, Ki-Seok Choo, Sang-Hyun Lee, Eun-Seok Shin, Jeong-Su Kim, Ki-Won Hwang, Soo-Yong Lee, Kook-Jin Chun, Cheol-Min Kim, June-Hong Kim
OBJECTIVES: This is an early feasibility clinical test of mitral loop cerclage annuloplasty to treat secondary mitral valve regurgitation. BACKGROUND: Secondary mitral regurgitation is characterized by cardiomyopathy, mitral annular enlargement, and leaflet traction contributing to malcoaptation. Transcatheter mitral loop cerclage applies circumferential compression to the mitral annulus by creating a loop through the coronary sinus across the interventricular septum, protecting entrapped coronary arteries from compression, and interactive annular reduction under echocardiographic guidance...
March 27, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28334320/interbody-spacer-material-properties-and-design-conformity-for-reducing-subsidence-during-lumbar-interbody-fusion
#4
Lillian S Chatham, Vikas V Patel, Christopher M Yakacki, R Dana Carpenter
One major complication with lumbar spinal fusion surgery is subsidence, in which the interbody spacer penetrates the vertebral endplates. Towards reducing the risk of subsidence, the objective of this study was to investigate the effects of interbody spacer material and design on the stress in the lumbar spine after interbody fusion. A finite element model of the L4-L5 motion segment was developed from computed tomography images of a cadaveric lumbar spine. A spacer, pedicle screws, and posterior rods were incorporated into the model, and the system was loaded under axial compression...
March 23, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28332867/age-related-changes-in-thoracic-skeletal-geometry-of-elderly-females
#5
Sven A Holcombe, Stewart C Wang, James B Grotberg
OBJECTIVE: Both females and the elderly have been identified as vulnerable populations with increased injury and mortality risk in multiple crash scenarios. Particularly in frontal impacts, older females show higher risk to the chest and thorax than their younger or male counterparts. Thoracic geometry plays a role in this increase, and this study aims to quantify key parts of that geometry in a way that can directly inform human body models that incorporate the concept of person age...
March 23, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28332239/clinical-application-of-calculated-split-renal-volume-using-computed-tomography-based-renal-volumetry-after-partial-nephrectomy-correlation-with-technetium-99m-dimercaptosuccinic-acid-renal-scan-data
#6
Chan Ho Lee, Young Joo Park, Ja Yoon Ku, Hong Koo Ha
OBJECTIVE: To evaluate the clinical application of computed tomography-based measurement of renal cortical volume and split renal volume as a single tool to assess the anatomy and renal function in patients with renal tumors before and after partial nephrectomy, and to compare the findings with technetium-99m dimercaptosuccinic acid renal scan. METHODS: The data of 51 patients with a unilateral renal tumor managed by partial nephrectomy were retrospectively analyzed...
March 22, 2017: International Journal of Urology: Official Journal of the Japanese Urological Association
https://www.readbyqxmd.com/read/28331888/new-concept-on-an-integrated-interior-magnetic-resonance-imaging-and-medical-linear-accelerator-system-for-radiation-therapy
#7
Xun Jia, Zhen Tian, Yan Xi, Steve B Jiang, Ge Wang
Image guidance plays a critical role in radiotherapy. Currently, cone-beam computed tomography (CBCT) is routinely used in clinics for this purpose. While this modality can provide an attenuation image for therapeutic planning, low soft-tissue contrast affects the delineation of anatomical and pathological features. Efforts have recently been devoted to several MRI linear accelerator (LINAC) projects that lead to the successful combination of a full diagnostic MRI scanner with a radiotherapy machine. We present a new concept for the development of the MRI-LINAC system...
January 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28329462/preoperative-use-of-ct-angiography-in-infants-with-coarctation-of-the-aorta
#8
Kirsten Rose-Felker, Joshua D Robinson, Carl L Backer, Cynthia K Rigsby, Osama M Eltayeb, Michael C Mongé, Karen Rychlik, Christina L Sammet, Jeffrey G Gossett
BACKGROUND: Computed tomographic angiography (CTA) and echocardiography (echo) are used preoperatively in coarctation of the aorta to define arch hypoplasia and great vessel branching. We sought to determine differences in quantitative measurements, as well as surgical utility, between modalities. METHODS: Infants (less than six months) with both CTA and echo prior to coarctation repair from 2004 to 2013 were included. Measurements were compared and correlated with surgical approach...
March 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28329054/whole-heart-detailed-and-quantitative-anatomy-myofibre-structure-and-vasculature-from-x-ray-phase-contrast-synchrotron-radiation-based-micro-computed-tomography
#9
Anna Gonzalez-Tendero, Chong Zhang, Vedrana Balicevic, Rubén Cárdenes, Sven Loncaric, Constantine Butakoff, Bruno Paun, Anne Bonnin, Patricia Garcia-Cañadilla, Emma Muñoz-Moreno, Eduard Gratacós, Fatima Crispi, Bart Bijnens
Background: While individual cardiac myocytes only have a limited ability to shorten, the heart efficiently pumps a large volume-fraction thanks to a cell organization in a complex 3D fibre structure. Subclinical subtle cardiac structural remodelling is often present before symptoms arise. Understanding and early detection of these subtle changes is crucial for diagnosis and prevention. Additionally, personalized computational modelling requires knowledge on the multi-scale structure of the whole heart and vessels...
March 15, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28322718/pseudoaneurysm-of-a-branch-of-the-femoral-circumflex-artery-as-a-complication-of-revision-arthroscopic-release-of-the-iliopsoas-tendon
#10
Naoki Nakano, Laughter Lisenda, Vikas Khanduja
Treatment of painful internal snapping hip via arthroscopic release of the iliopsoas tendon is becoming the preferred option over open techniques because of the benefits of minimal dissection and fewer complications. However, complications do occur with arthroscopic techniques as well. We present the case of a 33-year-old woman who presented with painful internal snapping of her right hip and underwent arthroscopic release of the iliopsoas tendon. Following the procedure she continued to complain of pain in her groin and was therefore investigated further with a magnetic resonance imaging (MRI) which revealed a swelling near the femoral circumflex vessels...
2017: SICOT-J
https://www.readbyqxmd.com/read/28322125/anatomy-specific-virtual-reality-simulation-in-temporal-bone-dissection
#11
Garrett D Locketz, Justin T Lui, Sonny Chan, Kenneth Salisbury, Joseph C Dort, Patricia Youngblood, Nikolas H Blevins
Objective To evaluate the effect of anatomy-specific virtual reality (VR) surgical rehearsal on surgeon confidence and temporal bone dissection performance. Study Design Prospective pre- and poststudy of a novel virtual surgical rehearsal platform. Setting Academic otolaryngology-head and neck surgery residency training programs. Subjects and Methods Sixteen otolaryngology-head and neck surgery residents from 2 North American training institutions were recruited. Surveys were administered to assess subjects' baseline confidence in performing 12 subtasks of cortical mastoidectomy with facial recess...
March 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28320428/a-topology-based-method-to-mitigate-the-dosimetric-uncertainty-caused-by-the-positional-variation-of-the-boost-volume-in-breast-conservative-radiotherapy
#12
Peng-Yi Lee, Chih-Yuan Lin, Shang-Wen Chen, Chun-Ru Chien, Chun-Nan Chu, Hsiu-Ting Hsu, Ji-An Liang, Ying-Jun Lin, An-Cheng Shiau
BACKGROUND: To improve local control rate in patients with breast cancer receiving adjuvant radiotherapy after breast conservative surgery, additional boost dose to the tumor bed could be delivered simultaneously via the simultaneous integrated boost (SIB) modulated technique. However, the position of tumor bed kept changing during the treatment course as the treatment position was aligned to bony anatomy. This study aimed to analyze the positional uncertainties between bony anatomy and tumor bed, and a topology-based approach was derived to stratify patients with high variation in tumor bed localization...
March 20, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28319480/right-axillary-artery-cannulation-for-endovascular-repair-of-an-acute-type-a-aortic-dissection
#13
Corbin E Muetterties, Jeremy H Conklin, G William Moser, Grayson H Wheatley
We present the case of a 48-year-old woman with an acute type A aortic dissection that was treated with thoracic endovascular aortic repair at our institution. The patient was found to have a focal type A dissection with pericardial effusion but no tamponade physiology and no involvement of the aortic valve or root. We elected to treat the patient's type A aortic dissection with an endovascular stent because of the patient's favorable anatomy and no evidence of neurologic deficits or signs of distal malperfusion...
March 17, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28318922/surgical-rehabilitation-for-anophthalmic-sockets-devoid-of-orbital-implant
#14
Doo-Ri Eo, Yoon-Duck Kim, Kyung In Woo
PURPOSE: To determine the necessity of rehabilitative surgical procedures for no implant anophthalmic sockets, and predictive factors of corrective operations after secondary orbital implantation. MATERIAL AND METHODS: Nineteen unilateral anophthalmic patients without orbital implant were included. The distance of eyebrow, upper eyelid margin, and lower eyelid margin from the horizontal medial canthal line (BM, UM, and LM, respectively) was measured using photographs...
February 13, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28317283/radiological-and-microsurgical-anatomy-for-variation-of-the-mandible-comparative-study-of-human-and-macaca-fascicularis
#15
Joe Iwanaga, Koichi Watanabe, Tsuyoshi Saga, Yoko Tabira, Eishi Hirasaki, Christian Fisahn, R Shane Tubbs, Jingo Kusukawa, Koh-Ichi Yamaki
Recent studies using cone-beam computer tomography (CBCT) have added to our understanding of anatomical variation in the mandible of humans. However, the distribution of nerves cannot be revealed by CBCT. There have been investigations of the distribution of nerves relating to the mandible, but some proposed causes of these variations remain controversial. In this study, we observed a total of 10 sides from five mandibles of Macaca fascicularis of unknown age and sex using CBCT and dissection under stereomicroscopy...
March 20, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28316884/three-dimensional-visualisation-of-the-internal-anatomy-of-the-sparrowhawk-accipiter-nisus-forelimb-using-contrast-enhanced-micro-computed-tomography
#16
Fernanda Bribiesca-Contreras, William I Sellers
BACKGROUND: Gross dissection is a widespread method for studying animal anatomy, despite being highly destructive and time-consuming. X-ray computed tomography (CT) has been shown to be a non-destructive alternative for studying anatomical structures. However, in the past it has been limited to only being able to visualise mineralised tissues. In recent years, morphologists have started to use traditional X-ray contrast agents to allow the visualisation of soft tissue elements in the CT context...
2017: PeerJ
https://www.readbyqxmd.com/read/28316309/high-resolution-ct-angiogram-for-lower-extremity-vein-mapping
#17
Mark P Wright, Matthew R Smeds, Lonnie Wright, Ahsan T Ali
High-resolution CT angiogram (CTA) has replaced traditional diagnostic angiography as the main preoperative imaging modality for vascular surgery patients. Although the use of CTA is increasing for arterial imaging, it has not been used routinely for vein mapping. The goal of this study was to evaluate the accuracy of CTA for venous anatomy and compare it to a standard venous duplex ultrasound (DUS). When the vein was used for bypass, the quality and size of the vein were evaluated in the operating room. As part of a preoperative workup before lower extremity revascularization, 16 patients underwent a CTA followed by a DUS...
March 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28315152/bilateral-robotic-transabdominal-adrenalectomy-in-a-patient-with-intestinal-malrotation
#18
Zuliang Feng, Carmen C Solórzano
Bilateral adrenalectomy is the preferred surgical approach for patients with failed treatments for pituitary-based Cushing's syndrome. Intestinal malrotation (IM) is a rare congenital anatomic variant that rarely affects adults. The abnormal abdominal anatomy is concerning to surgeons planning elective procedures in such patients. Here, we describe a bilateral robotic transabdominal adrenalectomy (RTA) in a patient with IM. A 29-year-old female presented with refractory pituitary-based Cushing's syndrome and was found to have IM on preoperative CT scan...
March 17, 2017: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/28306555/assessment-of-dosimetric-impact-of-system-specific-geometric-distortion-in-an-mri-only-based-radiotherapy-workflow-for-prostate
#19
C Gustafsson, F Nordström, E Persson, J Brynolfsson, L E Olsson
Dosimetric errors in a magnetic resonance imaging (MRI) only radiotherapy workflow may be caused by system specific geometric distortion from MRI. The aim of this study was to evaluate the impact on planned dose distribution and delineated structures for prostate patients, originating from this distortion. A method was developed, in which computer tomography (CT) images were distorted using the MRI distortion field. The displacement map for an optimized MRI treatment planning sequence was measured using a dedicated phantom in a 3 T MRI system...
March 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28303634/novel-integrated-3d-multidetector-computed-tomography-and-fluoroscopy-fusion-for-left-atrial-appendage-occlusion-procedures
#20
A K Roy, J Horvilleur, B Cormier, M Cazalas, L Fernandez, M Patane, A Neylon, M Spaziano, F J Sawaya, T Arai, E Bouvier, T Hovasse, T Lefèvre, B Chevalier, P Garot
OBJECTIVES: This report demonstrates the application and feasibility of novel 3D-MDCT real-time fusion technology with fluoroscopy, for left atrial appendage (LAA) occlusion procedures. BACKGROUND: A successful LAA occlusion procedure relies on multiple imaging modalities, including TEE or 3D-MDCT, and fluoroscopy. Effectively integrating these imaging modalities may improve implantation safety and success. To our knowledge this technique has not been previously described for LAA occlusions...
March 17, 2017: Catheterization and Cardiovascular Interventions
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