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3D ultrasound

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https://www.readbyqxmd.com/read/28332142/flat-detector-cone-beam-ct-guided-nephrostomy-using-virtual-navigation-in-patients-with-iatrogenic-ureteral-injury
#1
Dechao Jiao, Zongming Li, Zhiguo Li, Shaofeng Shui, Xin-Wei Han
PURPOSE: To evaluate the feasibility of flat detector cone beam computed tomography (CBCT)-guided nephrostomy using virtual navigation in patients with iatrogenic ureteral injury. MATERIALS AND METHODS: A retrospective review of percutaneous nephrostomy (PN) revealed the use of CBCT with 3D virtual navigation guidance in 42 procedures (40 patients) for patients with iatrogenic ureteral injury. All procedures were shown as second-line interventions after failed ultrasound-guided nephrostomy...
March 22, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28331733/3d-supine-automated-ultrasound-saus-abus-abvs-for-supplemental-screening-women-with-dense-breasts
#2
EDITORIAL
Alexander Mundinger
No abstract text is available yet for this article.
April 2016: J Breast Health (2013)
https://www.readbyqxmd.com/read/28321804/on-the-reproducibility-of-expert-operated-and-robotic-ultrasound-acquisitions
#3
Risto Kojcev, Ashkan Khakzar, Bernhard Fuerst, Oliver Zettinig, Carole Fahkry, Robert DeJong, Jeremy Richmon, Russell Taylor, Edoardo Sinibaldi, Nassir Navab
PURPOSE: We present the evaluation of the reproducibility of measurements performed using robotic ultrasound imaging in comparison with expert-operated sonography. Robotic imaging for interventional procedures may be a valuable contribution, but requires reproducibility for its acceptance in clinical routine. We study this by comparing repeated measurements based on robotic and expert-operated ultrasound imaging. METHODS: Robotic ultrasound acquisition is performed in three steps under user guidance: First, the patient is observed using a 3D camera on the robot end effector, and the user selects the region of interest...
March 20, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28315882/comparison-of-total-kidney-volume-quantification-methods-in-autosomal-dominant-polycystic-disease-for-a-comprehensive-disease-assessment
#4
Dario Turco, Marco Busutti, Renzo Mignani, Riccardo Magistroni, Cristiana Corsi
BACKGROUND: In recent times, the scientific community has been showing increasing interest in the treatments aimed at slowing the progression of the autosomal dominant polycystic kidney disease (ADPKD). Therefore, in this paper, we test and evaluate the performance of several available methods for total kidney volume (TKV) computation in ADPKD patients - from echography to MRI - in order to optimize patient classification. METHODS: Two methods based on geometric assumptions (mid-slice [MS], ellipsoid [EL]) and a third one on true contour detection were tested on 40 ADPKD patients at different disease stage using MRI...
March 18, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28306539/three-dimensional-power-doppler-of-the-placenta-and-its-clinical-applications
#5
Kelly Yamasato, Ivica Zalud
The aim of this review is to discuss three dimensional (3D) power Doppler of the placenta and its clinical applications. There is a strong clinical need to develop noninvasive, simple and widely available methods of evaluating in vivo placental function to assess fetal wellbeing. While conventional ultrasound is a proven tool in the evaluation of fetal structural anomalies and health, its ability to assess placental function, especially prior to the onset of fetal compromise, is the subject of ongoing investigation...
March 17, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28301597/boiling-histotripsy-lesion-characterization-on-a-clinical-magnetic-resonance-imaging-guided-high-intensity-focused-ultrasound-system
#6
Avinash Eranki, Navid Farr, Ari Partanen, Karun V Sharma, Hong Chen, Christopher T Rossi, Satya V V N Kothapalli, Matthew Oetgen, AeRang Kim, Ayele H Negussie, David Woods, Bradford J Wood, Peter C W Kim, Pavel S Yarmolenko
PURPOSE: High intensity focused ultrasound (HIFU) is a non-invasive therapeutic technique that can thermally ablate tumors. Boiling histotripsy (BH) is a HIFU approach that can emulsify tissue in a few milliseconds. Lesion volume and temperature effects for different BH sonication parameters are currently not well characterized. In this work, lesion volume, temperature distribution, and area of lethal thermal dose were characterized for varying BH sonication parameters in tissue-mimicking phantoms (TMP) and demonstrated in ex vivo tissues...
2017: PloS One
https://www.readbyqxmd.com/read/28298968/feasibility-of-imaging-superficial-palmar-arch-using-micro-ultrasound-7t-and-3t-magnetic-resonance-imaging
#7
Alison N Pruzan, Audrey E Kaufman, Claudia Calcagno, Yu Zhou, Zahi A Fayad, Venkatesh Mani
AIM: To demonstrate feasibility of vessel wall imaging of the superficial palmar arch using high frequency micro-ultrasound, 7T and 3T magnetic resonance imaging (MRI). METHODS: Four subjects (ages 22-50 years) were scanned on a micro-ultrasound system with a 45-MHz transducer (Vevo 2100, VisualSonics). Subjects' hands were then imaged on a 3T clinical MR scanner (Siemens Biograph MMR) using an 8-channel special purpose phased array carotid coil. Lastly, subjects' hands were imaged on a 7T clinical MR scanner (Siemens Magnetom 7T Whole Body Scanner) using a custom built 8-channel transmit receive carotid coil...
February 28, 2017: World Journal of Radiology
https://www.readbyqxmd.com/read/28298706/an-assessment-of-fetal-cerebral-and-hepatic-perfusion-in-normal-pregnancy-and-pre-eclampsia-using-three-dimensional-ultrasound
#8
Susan Addley, Amanda Ali, Stephen Ong
BACKGROUND: Pre-eclampsia and placental causes of intrauterine growth restriction (IUGR) are part of the same spectrum of disorders. In IUGR, there is preferential shunting of blood to the fetal brain at the expense of other organs. We wanted to demonstrate that this also occurs in pre-eclampsia using three dimensional (3D) ultrasound. The 3D indices of perfusion are: flow index (FI), vascular index (VI) and vascularisation flow index (VFI) which reflect tissue vascularity and flow intensity...
January 2017: Ulster Medical Journal
https://www.readbyqxmd.com/read/28295403/toward-a-3d-transrectal-ultrasound-system-for-verification-of-needle-placement-during-high-dose-rate-interstitial-gynecologic-brachytherapy
#9
Jessica Robin Rodgers, Kathleen Surry, Eric Leung, David D'Souza, Aaron Fenster
PURPOSE: Treatment for gynecologic cancers, such as cervical, recurrent endometrial, and vaginal malignancies, commonly includes external-beam radiation and brachytherapy. In high-dose-rate (HDR) interstitial gynecologic brachytherapy, radiation treatment is delivered via hollow needles that are typically inserted through a template on the perineum with a cylinder placed in the vagina for stability. Despite the need for precise needle placement to minimize complications and provide optimal treatment, there is no standard intra-operative image-guidance for this procedure...
March 15, 2017: Medical Physics
https://www.readbyqxmd.com/read/28291767/new-dimensions-in-renal-transplant-sonography-applications-of-3-dimensional-ultrasound
#10
Susan J Frank, William R Walter, Larry Latson, Hillel W Cohen, Mordecai Koenigsberg
BACKGROUND: The aim of this study is to demonstrate the usefulness of adding 3-dimensional (3D) ultrasound in evaluation of renal transplant vasculature compared to 2-dimensional (2D) Duplex ultrasound. METHODS: One hundred thirteen consecutive renal transplant 2D and 3D ultrasound examinations were performed and retrospectively reviewed by 2 board-certified radiologists and a radiology resident individually; each reviewed 2D and then 3D images, including color and spectral Doppler...
April 21, 2016: Transplantation
https://www.readbyqxmd.com/read/28288666/reliability-of-preoperative-evaluation-of-postmenopausal-ovarian-tumors
#11
Riikka Johanna Niemi, Sami Kristian Saarelainen, Tiina Hannele Luukkaala, Johanna Unelma Mäenpää
BACKGROUND: Preoperative evaluation of ovarian tumors is challenging. This study was undertaken to evaluate the performance of conventional two-dimensional (2D) ultrasound and CA125 in predicting malignant or benign nature of pelvic masses, and to investigate if three-dimensional power Doppler (3DPD) ultrasound provides any added value. Ninety-six postmenopausal and four perimenopausal women with supposed ovarian tumors were examined by standardized 2D and 3DPD ultrasounds preoperatively...
March 14, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28288540/brainstem-vermis-and-brainstem-tentorium-angles-3d-ultrasound-study-of-the-intra-and-inter-observer-agreement
#12
Tamara Illescas, Pilar Martínez-Ten, Carmina Bermejo, María Estévez, Begoña Adiego
OBJECTIVE: The brainstem-vermis angle (BVA) and the brainstem-tentorium angle (BTA) have been proposed to quantify vermian and tentorial alterations associated to fetal posterior fossa malformations. Our objective is to evaluate the intra- and inter-observer agreement for the measurement of these angles during the prenatal ultrasound scan. METHODS: Fifteen 3D sets from fetuses with posterior fossa pathology were processed by multiplanar navigation. Four experts in prenatal ultrasound measured the BVA and the BTA on a mid-sagittal view of the fetal brain, following the criteria described by Volpe(1)...
March 13, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28284038/3d-and-4d-studies-from-human-reproduction-to-perinatal-medicine
#13
Sonal Panchal, Asim Kurjak, Chaitanya Nagori
Three-dimensional ultrasound (3D US) is a modality of choice for prenatal diagnosis of congenital malformations. But 3D-four-dimensional US(4D US) is of utmost importance also to achieve pregnancy. 3D US plays an important role for diagnosis of PCO, to assess ovarian reserve and response and thus to decide optimum stimulation protocols. It adds to the information on follicular maturity and endometrial receptivity, thus improving the chances to achieve pregnancy for patients under treatment for fertility. 3D hystero-contrast-salpingography (HyCoSy) has also proved itself to be one of the best modalities for assessment of tubal patency...
March 11, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28282764/influence-of-difficulty-of-instrumentation-with-vacuum-on-the-rate-of-levator-ani-muscle-avulsion-identified-by-3-4%C3%A2-d-transperineal-ultrasound
#14
José Antonio García Mejido, Paloma De la Fuente Vaquero, Ana Fernández Palacín, Adriana Aquise Pino, María José Bonomi Barby, José Antonio Sainz Bueno
OBJECTIVES: Evaluation of the influence of difficulty of instrumentation with vacuum on the rate of levator ani muscle (LAM) avulsions. MATERIALS AND METHODS: Prospective observational study with 86 nulliparous women with at term gestation who required instrumentation with vacuum to complete fetal extraction. After every delivery, each explorer reported the number of vacuum tractions needed to complete fetal extraction, as well as the subjective complexity of the instrumentation...
March 1, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28274755/semiautomatic-quantification-of-carotid-plaque-volume-with-three-dimensional-ultrasound-imaging
#15
Amir A Khan, Christian Koudelka, Carly Goldstein, Limin Zhao, John Yokemick, Moira Dux, Siddhartha Sikdar, Brajesh K Lal
OBJECTIVE: Vessel wall volume (VWV) assessed by three-dimensional duplex ultrasound (3DUS) imaging provides a more comprehensive measure of plaque burden than conventional two-dimensional measures of diameter stenosis. We previously demonstrated that manual outlining of the arterial lumen-intima boundary and outer wall boundary can be performed reliably on images obtained with a commercially available 3D-DUS transducer. Manual segmentation, however, is time consuming (∼45 minutes), limiting its clinical translation...
March 5, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28274407/comparison-of-2-transabdominal-ultrasound-image-guidance-techniques-for-prostate-and-prostatic-fossa-radiation-therapy
#16
Bill J Salter, Martin Szegedi, Christine Boehm, Vikren Sarkar, Prema Rassiah-Szegedi, Brian Wang, Hui Zhao, Jessica Huang, Long Huang, Kris Kokeny, Jonathan D Tward
PURPOSE: Our clinic is a long-term user of a first-generation transabdominal (TA) biplanar (2.5-dimensional [2.5D]) ultrasound image guidance (USIG) system for prostate cancer treatments. We are also an early adopter and development partner for a new, second-generation, fully 3D USIG system that allows for volumetric TA localization of the prostate. This new system has been evaluated at our institution by direct comparison with the previously established first-generation TA method for prostate alignment...
March 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28273604/mucocele-complicating-stapled-hemorrhoidopexy
#17
Asia Grapsi, Alessandro Sturiale, Bernardina Fabiani, Gabriele Naldini
INTRODUCTION: Stapled hemorrhoidopexy is a safe and effective treatment for circumferential hemorrhoidal prolapse. The overall rate of complications ranges from 12,7% to 36,4% and the surgeon should be aware about their early identification and adequate treatment. PRESENTATION OF CASE: Female patient, 57 years was treated with stapled hemorrhoidopexy. Two years after surgery she reported to our center the occurrence of perineal discomfort, anal spasm and tenesmus...
February 20, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28271356/geometric-modeling-of-hepatic-arteries-in-3d-ultrasound-with-unsupervised-mra-fusion-during-liver-interventions
#18
Maxime Gérard, François Michaud, Alexandre Bigot, An Tang, Gilles Soulez, Samuel Kadoury
PURPOSE: Modulating the chemotherapy injection rate with regard to blood flow velocities in the tumor-feeding arteries during intra-arterial therapies may help improve liver tumor targeting while decreasing systemic exposure. These velocities can be obtained noninvasively using Doppler ultrasound (US). However, small vessels situated in the liver are difficult to identify and follow in US. We propose a multimodal fusion approach that non-rigidly registers a 3D geometric mesh model of the hepatic arteries obtained from preoperative MR angiography (MRA) acquisitions with intra-operative 3D US imaging...
March 7, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28269187/multi-scale-ransac-algorithm-for-needle-localization-in-3d-ultrasound-guided-puncture-surgery
#19
Jing Jin, Ruixue Shen, Yue Zhao, Yang Xiao, Dandan Li, Yi Shen
Correct localization of the needle is of vital importance to guarantee successful puncture. The complexity of real US data increases the difficulties. A multi-scale random sample consensus (MS-RANSAC) algorithm is proposed in this paper to locate the needle in complicated 3D US data. The algorithm uses the radius difference between needle and other tubular human tissues to extract the correct needle location. The performance of classic RANSAC and MS-RANSAC are compared using three different datasets. Results show that MS-RANSAC can locate needle correctly in complicated condition where classic RANSAC cannot...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269186/3d-2d-ultrasound-feature-based-registration-for-navigated-prostate-biopsy-a-feasibility-study
#20
Sonia Y Selmi, Emmanuel Promayon, Jocelyne Troccaz
The aim of this paper is to describe a 3D-2D ultrasound feature-based registration method for navigated prostate biopsy and its first results obtained on patient data. A system combining a low-cost tracking system and a 3D-2D registration algorithm was designed. The proposed 3D-2D registration method combines geometric and image-based distances. After extracting features from ultrasound images, 3D and 2D features within a defined distance are matched using an intensity-based function. The results are encouraging and show acceptable errors with simulated transforms applied on ultrasound volumes from real patients...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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