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https://www.readbyqxmd.com/read/29913523/dental-imaging-a-basic-guide-for-the-radiologist
#1
Max Masthoff, Mirjam Gerwing, Malte Masthoff, Maximilian Timme, Johannes Kleinheinz, Markus Berninger, Walter Heindel, Moritz Wildgruber, Christoph Schülke
BACKGROUND:  As dental imaging accounts for approximately 40 % of all X-ray examinations in Germany, profound knowledge of this topic is essential not only for the dentist but also for the clinical radiologist. This review focuses on basic imaging findings regarding the teeth. Therefore, tooth structure, currently available imaging techniques and common findings in conserving dentistry including endodontology, periodontology, implantology and dental trauma are presented. METHODS:  Literature research on the current state of dental radiology was performed using Pubmed...
June 18, 2018: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/29912805/obtaining-a-reliable-scaphotrapeziotrapezoid-radiograph-pronation-ulnar-deviation-and-thumb-abduction
#2
Brent R DeGeorge, Nicholas Pulos, Alexander Y Shin
A simple, reproducible technique for assessing the scaphotrapeziotrapezoid joint radiographically is described. In addition to its diagnostic value, the technique is simple to perform with a minifluoroscopy unit, allowing for image-guided injections of the scaphotrapeziotrapezoid joint.
June 16, 2018: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/29912727/ultrasound-imaging-for-sarcopenia-spasticity-and-painful-muscle-syndromes
#3
Levent Özçakar, Ayşe Merve Ata, Bayram Kaymak, Murat Kara, Dinesh Kumbhare
PURPOSE OF REVIEW: On the basis of its various advantages and the relevant awareness of physicians, ultrasound imaging has overwhelmingly taken its place in the scientific arena. This is true both from the side of daily clinical applications and also from the side of research. Yet, ultrasound provides real-time (diagnostic) imaging and (interventional) guidance for a wide spectrum of muscle disorders. In this regard, this review aims to discuss the potential/actual utility of ultrasound imaging in particular muscle disorders, that is, sarcopenia, spasticity and fibromyalgia/myofascial pain syndrome...
June 15, 2018: Current Opinion in Supportive and Palliative Care
https://www.readbyqxmd.com/read/29911967/from-principles-to-practice-real-world-patient-and-stakeholder-engagement-in-breast-cancer-research
#4
Sarah M Greene, Susan Brandzel, Karen J Wernli
The Patient-Centered Outcomes Research Institute (PCORI) in Washington, DC, has catalyzed a meaningful shift in the composition of research project teams since its initial research funding cycle in 2011. Despite the influx of funding in the research community for patient-centered research, research on how to effectively engage patients and stakeholders in the research process is still relatively nascent. Kaiser Permanente Washington Health Research Institute (KPWHRI) in Seattle, WA, was an early recipient of PCORI research funding and, as of December 2017, has received 8 PCORI research awards totaling nearly $15 million...
June 6, 2018: Permanente Journal
https://www.readbyqxmd.com/read/29911682/contact-guidance-is-cell-cycle-dependent
#5
Kamyar Esmaeili Pourfarhangi, Edgar Cardenas De La Hoz, Andrew R Cohen, Bojana Gligorijevic
Cancer cell migration is essential for metastasis, during which cancer cells move through the tumor and reach the blood vessels. In vivo , cancer cells are exposed to contact guidance and chemotactic cues. Depending on the strength of such cues, cells will migrate in a random or directed manner. While similar cues may also stimulate cell proliferation, it is not clear whether cell cycle progression affects migration of cancer cells and whether this effect is different in random versus directed migration. In this study, we tested the effect of cell cycle progression on contact guided migration in 2D and 3D environments, in the breast carcinoma cell line, FUCCI-MDA-MB-231...
September 2018: APL bioengineering
https://www.readbyqxmd.com/read/29911581/real-time-ultrasound-guided-infraorbital-nerve-block-to-treat-trigeminal-neuralgia-using-a-high-concentration-of-tetracaine-dissolved-in-bupivacaine
#6
Kenichi Takechi, Amane Konishi, Kotaro Kikuchi, Shiho Fujioka, Tomomi Fujii, Toshihiro Yorozuya, Koh Kuzume, Takumi Nagaro
Background Trigeminal neuralgia is a neuropathic disorder characterized by episodes of intense pain in the face. Drug therapy is the first choice of treatment. However, in cases where drug therapy are contraindicated due to side effects, patients can get pain relief from lengthy neurosurgical procedures. Alternatively, a peripheral trigeminal nerve block can be easily performed in an outpatient setting. Therefore it is a useful treatment option for the acute paroxysmal period of TN in patients who cannot use drug therapy...
December 29, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29911065/three-dimensional-cone-beam-computed-tomography-assessment-of-additional-canals-of-permanent-first-molars-a-pinocchio-for-successful-root-canal-treatment
#7
Rayan Alswilem, Anas Abouonq, Azhar Iqbal, Sarah Sulaiman Alajlan, Mohammad Khursheed Alam
Aims and Objectives: The objective of this study was to estimate the prevalence of additional canals in the first permanent molars of the participants of Saudi, Jordanian, and Egyptian population using cone-beam computed tomography (CBCT). Materials and Methods: In this retrospective study, CBCT scans of 139 patients were collected who were implant treated at College of Dentistry, Al Jouf University, Saudi Arabia, from October 2016 to March 2017. The images were analyzed using On-Demand 3D software...
May 2018: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29910831/postoperative-radiotherapy-after-nipple-or-skin-sparing-mastectomy-a-review-of-recent-institutional-and-pooled-data
#8
REVIEW
Jacques Bernier
The increasing use of nipple-sparing mastectomy (NSM) and skin-sparing mastectomy (SSM) in the treatment of nonmetastatic breast cancer is justified by considerations linked to their therapeutic index. In selected patients, efficacy results tend to be similar to those observed after radical modified mastectomy and at the same time, subcutaneous mastectomies preserve the patient's body image. Yet the oncologic safety of the two former surgical approaches is still a matter of debate, also in consideration of the almost complete absence of clinical studies directed to prospective, controlled comparisons between subcutaneous and radical modified mastectomies...
2018: Ecancermedicalscience
https://www.readbyqxmd.com/read/29909734/anatomic-feasibility-of-percutaneous-cholecystoenteric-fistula-creation-and-stent-insertion-in-acute-cholecystitis
#9
Rebecca Zener, Lee L Swanström, Eran Shlomovitz
OBJECTIVE: To assess the prevalence of patients whose anatomy would be potentially amenable to percutaneous cholecystoenteric lumen-apposing metallic stents (LAMS) insertion from a population of acute cholecystitis patients. METHODS: Contrast-enhanced abdominal computed tomography images in 100 consecutive adult patients with acute cholecystitis were reviewed retrospectively. Feasibility of LAMS placement percutaneously or with endoscopic ultrasound guidance was defined as the presence of a straight and unobstructed trajectory from the skin to the gallbladder, and between the gallbladder and the gastric antrum, or the proximal duodenum, measuring ≤2 cm, respectively...
June 1, 2018: Surgical Innovation
https://www.readbyqxmd.com/read/29909727/choledochoscopic-examination-of-a-3-dimensional-printing-model-using-augmented-reality-techniques-a-preliminary-proof-of-concept-study
#10
Rui Tang, Longfei Ma, Ang Li, Lihan Yu, Zhixia Rong, Xinjing Zhang, Canhong Xiang, Hongen Liao, Jiahong Dong
BACKGROUND: We applied augmented reality (AR) techniques to flexible choledochoscopy examinations. METHODS: Enhanced computed tomography data of a patient with intrahepatic and extrahepatic biliary duct dilatation were collected to generate a hollow, 3-dimensional (3D) model of the biliary tree by 3D printing. The 3D printed model was placed in an opaque box. An electromagnetic (EM) sensor was internally installed in the choledochoscope instrument channel for tracking its movements through the passages of the 3D printed model, and an AR navigation platform was built using image overlay display...
June 1, 2018: Surgical Innovation
https://www.readbyqxmd.com/read/29909528/accuracy-of-computer-aided-design-models-of-the-jaws-produced-using-ultra-low-mdct-doses-and-asir-and-mbir
#11
Asma'a A Al-Ekrish, Sara A Alfadda, Wadea Ameen, Romed Hörmann, Wolfgang Puelacher, Gerlig Widmann
PURPOSE: To compare the surface of computer-aided design (CAD) models of the maxilla produced using ultra-low MDCT doses combined with filtered backprojection (FBP), adaptive statistical iterative reconstruction (ASIR) and model-based iterative reconstruction (MBIR) reconstruction techniques with that produced from a standard dose/FBP protocol. METHODS: A cadaveric completely edentulous maxilla was imaged using a standard dose protocol (CTDIvol: 29.4 mGy) and FBP, in addition to 5 low dose test protocols (LD1-5) (CTDIvol: 4...
June 16, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29908993/priors-guided-slice-wise-adaptive-outlier-cleaning-for-arterial-spin-labeling-perfusion-mri
#12
Yiran Li, Sudipto Dolui, Dan-Feng Xie, Ze Wang
BACKGROUND: Due to the low signal-to-noise-ratio (SNR) and unavoidable head motions, the pairwise subtraction perfusion signal extraction process in arterial spin labeling (ASL) perfusion MRI can produce extreme outliers. COMPARISON WITH EXISTING METHODS: We previously proposed an adaptive outlier cleaning (AOC) algorithm for ASL MRI. While it performed well even for clinical ASL data, two issues still exist. One is that if the reference is already dominated by noise, outlier cleaning using low correlation with the mean as a rejection criterion will actually reject the less noisy samples but keep the more noisy ones...
June 14, 2018: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29908945/residual-setup-errors-towards-the-heart-after-image-guidance-linked-with-poorer-survival-in-lung-cancer-patients-do-we-need-stricter-igrt-protocols
#13
Corinne N Johnson, Gareth J Price, Corinne Faivre-Finn, Marianne C Aznar, Marcel van Herk
BACKGROUND: and Purpose: Image-guided radiotherapy (IGRT) is widely used but data directly relating setup errors to patient outcome is scarce. This study investigates the relationship between residual IGRT shifts and overall patient survival, and uses the observed relations to identify structures sensitive to radiation dose. MATERIALS AND METHODS: Residual shift data for 780 NSCLC patients was summarised for each patient over the course of treatment by determining the mean shifts, standard deviations and the vector shift in the direction of the heart...
June 1, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29908832/cardiac-resynchronization-therapy-guided-by-cardiac-magnetic-resonance-imaging-a-prospective-single-centre-randomized-study-cmr-crt
#14
Radka Kočková, Kamil Sedláček, Dan Wichterle, Viktor Šikula, Jaroslav Tintěra, Helena Jansová, Alena Pravečková, Renata Langová, Lukáš Krýže, Wael El-Husseini, Markéta Segeťová, Josef Kautzner
BACKGROUND: Cardiac resynchronization therapy (CRT) improves symptoms of heart failure (HF), morbidity and mortality in selected population. The aim of the study was to investigate the impact of cardiac magnetic resonance (CMR)-guided left ventricular (LV) lead placement on clinical outcomes and LV reverse remodelling in CRT recipients. METHODS: Patients with CRT indication were randomized for CMR-guided (CMR group) or electrophysiologically guided (EP group) LV lead placement between 2011 and 2014...
June 6, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29908716/ultrasonographical-identification-of-the-superficial-circumflex-iliac-artery-as-a-landmark-for-location-of-the-femoral-nerve-in-dogs
#15
Fernando L Garcia-Pereira, Daniel Boruta, Sharon Tenenbaum, Vaidehi Paranjape
OBJECTIVE: To investigate the utility of identifying the superficial circumflex iliac artery (SCIA) via ultrasound as an anatomical landmark for ultrasound-guided femoral nerve block. STUDY DESIGN: Observational study. ANIMALS: A group of six canine cadavers weighing >20 kg. METHODS: Pelvic limbs from six canine cadavers were examined to study the relationship between the SCIA and the femoral nerve. Ultrasonographic imaging of the SCIA in each limb was obtained with the transducer placed transversely in the medial aspect of the pelvic limb at the inguinal area...
April 13, 2018: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29908220/an-automated-multiparametric-mri-quantitative-imaging-prostate-habitat-risk-scoring-system-for-defining-external-beam-radiotherapy-boost-volumes
#16
Radka Stoyanova, Felix Chinea, Deukwoo Kwon, Isildinha M Reis, Yohann Tschudi, Nestor A Parra, Adrian L Breto, Kyle R Padgett, Alan Dal Pra, Matthew C Abramowitz, Oleksandr N Kryvenko, Sanoj Punnen, Alan Pollack
PURPOSE: To develop a prostate tumor habitat risk scoring (HRS) system based on multiparametric MRI (mpMRI) referenced to prostatectomy Gleason Score (GS) for automatic delineation of Gross Tumor Volumes (GTVs). A workflow for integration of HRS into radiotherapy (RT) boost volume dose escalation was developed in the framework of a Phase II randomized clinical trial (BLaStM). MATERIALS AND METHODS: An automated quantitative mpMRI based 10 point pixel by pixel method was optimized to prostatectomy GSs and volumes using referenced Dynamic Contrast Enhanced and Apparent Diffusion Coefficient sequences...
June 13, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29907502/functional-liver-image-guided-hepatic-therapy-flight-with-hepatobiliary-iminodiacetic-acid-hida-scans
#17
David E Long, Mark Tann, Ke Colin Huang, Gregory Bartlett, James O Galle, Yukie Furukawa, Mary Maluccio, John A Cox, Feng-Ming Spring Kong, Susannah G Ellsworth
PURPOSE: Hepatobiliary iminodiacetic acid (HIDA) scans provide global and regional assessments of liver function that can serve as a road map for functional avoidance in stereotactic body radiation therapy (SBRT) planning. Functional liver image guided hepatic therapy (FLIGHT), an innovative planning technique, is described and compared with standard planning using functional dose-volume histograms. Thresholds predicting for decompensation during follow up are evaluated. METHODS AND MATERIALS: We studied 17 patients who underwent HIDA scans before SBRT...
May 1, 2018: Practical Radiation Oncology
https://www.readbyqxmd.com/read/29907488/correlation-of-regional-lung-ventilation-and-gas-transfer-to-red-blood-cells-implications-for-functional-avoidance-radiation-therapy-planning
#18
Leith J Rankine, Ziyi Wang, Bastiaan Driehuys, Lawrence B Marks, Chris R Kelsey, Shiva K Das
PURPOSE: To investigate the degree to which lung ventilation and gas exchange are regionally correlated, using the emerging technology of hyperpolarized (HP)-129 Xe magnetic resonance imaging (MRI). METHODS AND MATERIALS: Hyperpolarized-129 Xe MRI studies were performed on 17 institutional review board-approved human subjects, including 13 healthy volunteers, 1 emphysema patient, and 3 non-small cell lung cancer patients imaged before and approximately 11 weeks after radiation therapy (RT)...
April 14, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29907260/usefulness-of-the-twinkling-artifact-on-doppler-ultrasound-for-the-detection-of-breast-microcalcifications
#19
A Relea, J A Alonso, M González, C Zornoza, S Bahamonde, B E Viñuela, M B Encinas
OBJECTIVE: To determine whether the twinkling artifact on Doppler ultrasound imaging corresponds to microcalcifications previously seen on mammograms and to evaluate the usefulness of this finding in the ultrasound management of suspicious microcalcifications. MATERIAL AND METHODS: We used ultrasonography to prospectively examine 46 consecutive patients with groups of microcalcifications suspicious for malignancy identified at mammography, searching for the presence of the twinkling artifact to identify the microcalcifications...
June 12, 2018: Radiología
https://www.readbyqxmd.com/read/29905844/robotic-assisted-mri-guided-interventional-interstitial-mr-guided-focused-ultrasound-ablation-in-a-swine-model
#20
Jacquelyn MacDonell, Niravkumar Patel, Gregory Fischer, E Clif Burdette, Jiang Qian, Vaibhav Chumbalkar, Goutam Ghoshal, Tamas Heffter, Emery Williams, Matthew Gounis, Robert King, Juliette Thibodeau, Gene Bogdanov, Olivia W Brooks, Erin Langan, Roy Hwang, Julie G Pilitsis
BACKGROUND: Ablative lesions are current treatments for epilepsy and brain tumors. Interstitial magnetic resonance (MR) guided focused ultrasound (iMRgFUS) may be an alternate ablation technique which limits thermal tissue charring as compared to laser therapy (LITT) and can produce larger ablation patterns nearer the surface than transcranial MR guided focused ultrasound (tcMRgFUS). OBJECTIVE: To describe our experience with interstitial focused ultrasound (iFUS) ablations in swine, using MR-guided robotically assisted (MRgRA) delivery...
June 14, 2018: Neurosurgery
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