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https://www.readbyqxmd.com/read/28532606/verifying-tumor-position-during-stereotactic-body-radiation-therapy-delivery-using-limited-arc-cone-beam-computed-tomography-imaging
#1
Colien Hazelaar, Max Dahele, Stefan Scheib, Ben J Slotman, Wilko F A R Verbakel
BACKGROUND AND PURPOSE: Proof of tumor position during stereotactic body radiotherapy (SBRT) delivery is desirable. We investigated if cone-beam CT (CBCT) scans reconstructed from (collimated) fluoroscopic kV images acquired during irradiation could show the dominant tumor position. MATERIALS AND METHODS: Full-arc CBCT scans were reconstructed using FDK filtered back projection from 38kV fluoroscopy datasets (16 patients) continuously acquired during volumetric modulated spine SBRT...
May 19, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28522155/fibroelastic-pseudotumour-elastofibroma-dorsi-detected-by-18-f-fdg-pet-ct-and-by-posttherapy-radioiodine-spect-ct
#2
M Oporto, F Cepa, N Orta, S Rubí, H Navalón, C Peña
Radioiodine uptake in the thyroid tissue, metastasis of differentiated thyroid cancer (DTC), and in other tissues, depends on the expression of sodium-iodide symporter (NIS). Vascular permeability, effusions, inflammation, and other mechanisms may also play a role in the accumulation of radioactive iodine. A 63-year-old woman underwent radioiodine therapy, as well as a post-therapy whole-body scan,as she was suspected of having lung metastasis from thyroid carcinoma. The scan not only showed uptake at the lung metastasis but also a faint diffuse bilateral uptake in the posterior thorax...
May 15, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28522112/diffuse-parenchymal-lung-disease-on-chest-radiographs-and-ct
#3
Theodore J Dubinsky, Hardik Shah, Rachelle Sonneborn, Daniel S Hippe
BACKGROUND: We prospectively identified B-lines in patients undergoing ultrasound examinations following liver transplants who also had a chest x-ray (CXR) and/or chest CT scan on the same day to determine if an association between the presence of B-lines s from the thorax on ultrasound images correlates with the presence of pulmonary abnormalities on chest radiographs. MATERIALS AND METHODS: Following IRB approval, patients undergoing routine postoperative liver transplant ultrasound examinations and a CXR and/or CT scan on the same day between 1/1/2015 through 7/1/2016 were prospectively identified...
May 15, 2017: Chest
https://www.readbyqxmd.com/read/28512000/computed-tomography-ct-compatible-remote-center-of-motion-needle-steering-robot-fusing-ct-images-and-electromagnetic-sensor-data
#4
Navid Shahriari, Wout Heerink, Tim van Katwijk, Edsko Hekman, Matthijs Oudkerk, Sarthak Misra
Lung cancer is the most common cause of cancer-related death, and early detection can reduce the mortality rate. Patients with lung nodules greater than 10 mm usually undergo a computed tomography (CT)-guided biopsy. However, aligning the needle with the target is difficult and the needle tends to deflect from a straight path. In this work, we present a CT-compatible robotic system, which can both position the needle at the puncture point and also insert and rotate the needle. The robot has a remote-center-of-motion arm which is achieved through a parallel mechanism...
May 13, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28511549/radiological-findings-on-irradiation-ct-in-patients-with-non-metastatic-breast-cancer
#5
Hans Jonas Meyer, Johannes Uhlig, Dominik Schramm, Andreas Gunter Bach, Alexey Surov
OBJECTIVE: The aim of this study was to evaluate the number of incidental findings on native CT treatment planning scans for radiation in breast cancer patients. METHODS: The treatment-planning scans of 382 patients with non-metastatic breast cancer were retrospectively analyzed for additional findings. The planning scan area covered the entire thorax and the upper part of the abdomen. Incidental findings were classified according to their clinical relevance Results: Overall 892 incidental findings were detected in the CT treatment-planning scans (mean 2...
May 16, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28499711/does-an-external-chest-wall-measurement-correlate-with-a-ct-based-measurement-in-patients-with-chest-wall-deformities
#6
Franziska Ewert, Julia Syed, Sonja Wagner, Manuel Besendoerfer, Roman T Carbon, Stefan Schulz-Drost
BACKGROUND: Measurements in chest wall deformities are typically conducted using a thorax caliper or a CT scan of the chest wall. This paper focuses on the possible correlation between these two methods to validate the reliability of the thorax caliper, minimize radiation exposure, and limit the usage of expensive imaging techniques. METHODS: We evaluated 95 consecutive patients (77 pectus excavatum (PE), 17 pectus carinatum (PC), 1 mixed deformity) who received surgical correction of the anterior chest wall...
April 27, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28491449/metastatic-pulmonary-carcinomas-in-cats-feline-lung-digit-syndrome-further-variations-on-a-theme
#7
Elizabeth Thrift, Chris Greenwell, Audra-Lynne Turner, Andrea M Harvey, Donna Maher, Richard Malik
CASE SERIES SUMMARY: The aim of this retrospective case series was to describe seven cases where cats with primary lung tumours were presented because of metastases to extra-pulmonary sites ('feline lung-digit syndrome'). Specifically, we wanted to emphasise less typical case descriptions where tumour emboli resulted in lesions developing in the musculature (including the muscles of the head), skin or distal aorta. RELEVANCE AND NOVEL INFORMATION: The cases are presented to increase clinical awareness of this entity in feline practice, especially when characteristic combinations of clinical signs are present...
January 2017: JFMS Open Rep
https://www.readbyqxmd.com/read/28489534/dynamic-2-d-3-d-rigid-registration-framework-using-point-to-plane-correspondence-model
#8
Jian Wang, Roman Schaffert, Anja Borsdorf, Benno Heigl, Xiaolin Huang, Joachim Hornegger, Andreas Maier
In image-guided interventional procedures, live 2-D X-ray images can be augmented with preoperative 3-D CT or MRI images to provide planning landmarks and enhanced spatial perception. An accurate alignment between the 3-D and 2-D images is a prerequisite for fusion applications. This paper presents a dynamic rigid 2-D/3-D registration framework, which measures the local 3-D-to-2-D misalignment and efficiently constrains the update of both planar and non-planar 3-D rigid transformations using a novel point-to-plane correspondence model...
May 8, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28475739/a-step-by-step-development-of-real-size-chest-model-for-simulation-of-thoracoscopic-surgery
#9
Toshiaki Morikawa, Makoto Yamashita, Makoto Odaka, Yo Tsukamoto, Takamasa Shibasaki, Shohei Mori, Hisatoshi Asano, Tadashi Akiba
OBJECTIVES: For the purpose of simulating thoracoscopic surgery, we have conducted stepwise development of a life-like chest model including thorax and intrathoracic organs. METHODS: First, CT data of the human chest were obtained. First-generation model: based on the CT data, each component of the chest was made from a 3D printer. A hard resin was used for the bony thorax and a rubber-like resin for the vessels and bronchi. Lung parenchyma, muscles and skin were not created...
May 4, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28465871/a-rare-case-of-hibernoma-occasionally-identified-by-18f-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-in-a-patient-with-lung-cancer
#10
Daniele Penna, Natale Quartuccio, Claudio Testa, Vincenzo Arena, Angelina Cistaro, Ettore Pelosi
Hibernoma is a benign tumor arising from brown fat tissue. Conventional imaging techniques are not able to differentiate it from other benign lesions or malignant fatty tumors. We report the case of a 73-year-old patient who underwent a thorax computed tomography (CT) and was then referred to our department for metabolic assessment of a solitary lung nodule. An F18-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG-PET/CT) scan was performed and demonstrated, in addition, a highly metabolic fat-containing lesion mimicking a malignant fatty tumor in the left great pectoralis muscle...
March 29, 2017: Curēus
https://www.readbyqxmd.com/read/28464566/multidetector-computed-tomographic-pulmonary-angiography-in-a-cat-with-fatal-heartworm-disease
#11
Ioannis Panopoulos, Swan Specchi, Nektarios Soubasis, Anastasia Papastefanou, Georgia Brellou, Edoardo Auriemma
A 17-month-old neutered male domestic shorthair cat was referred for a computed tomographic (CT) study of the thorax due to respiratory distress. Multidetector CT angiography showed a multifocal interstitial ground glass opacity, tortuous and blunted pulmonary arteries consistent with thromboembolism with perivascular lung infiltration and hypoventilation in multiple lung lobes. A blood antigen test was positive for Dirofilaria immitis. The cat's clinical condition rapidly declined and the owners elected euthanasia...
May 2, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28453911/validation-of-biomechanical-deformable-image-registration-in-the-abdomen-thorax-and-pelvis-in-a-commercial-radiotherapy-treatment-planning-system
#12
Michael Velec, Joanne L Moseley, Stina Svensson, Björn Hårdemark, David A Jaffray, Kristy K Brock
PURPOSE: The accuracy of deformable image registration tools can vary widely between imaging modalities and specific implementations of the same algorithms. A biomechanical model-based algorithm initially developed in-house at an academic institution was translated into a commercial radiotherapy treatment planning system and validated for multiple imaging modalities and anatomic sites. METHODS: Biomechanical deformable registration (Morfeus) is a geometry driven algorithm based on the finite element method...
April 28, 2017: Medical Physics
https://www.readbyqxmd.com/read/28453660/effect-of-patient-size-anatomical-location-and-modulation-strength-on-dose-delivered-and-image-quality-on-ct-examination
#13
Joël Greffier, Ahmed Larbi, Francesco Macri, Jean-Paul Beregi, Fabricio Pereira
To study the effect of patient size, anatomical location and modulation strength (MS) on image-quality and delivered dose of CT scans acquired with automatic-exposure-control system (AEC). Four anthropomorphic phantoms (three paediatric and one thin adult) were studied, and normal and obese adults were simulated by placing bolus plates around the adult phantom. Thorax and abdomen-pelvis CT were performed using an AEC system equipped with five possible MS. Modulated tube current (mAsmod) was compared to Reference mAs and image-noise was assessed...
April 27, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28447284/apical-sparing-pattern-of-left-ventricular-myocardial-99m-tc-hmdp-uptake-in-patients-with-transthyretin-cardiac-amyloidosis
#14
Axel Van Der Gucht, Anne-Ségolène Cottereau, Mukedaisi Abulizi, Aziz Guellich, Paul Blanc-Durand, Jean-Marc Israel, Arnault Galat, Violaine Plante-Bordeneuve, Jean-Luc Dubois-Randé, Diane Bodez, Jean Rosso, Thibaud Damy, Emmanuel Itti
BACKGROUND: A decreased longitudinal strain in basal segments with a base-to-apex gradient has been described in patients with cardiac amyloidosis (CA). OBJECTIVES: Aim was to investigate the left ventricular (LV) regional distribution of early-phase (99m)Tc-Hydroxymethylene diphosphonate ((99m)Tc-HMDP) uptake in patients with transthyretin-related cardiac amyloidosis (TTR-CA). METHODS: All patients underwent a whole-body planar (99m)Tc-HMDP scintigraphy acquired at 10-min post-injection (early-phase) followed by a thorax SPECT/CT...
April 26, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28440911/unnoticed-aspiration-of-palate-plate-impression-material-in-a-neonate-diagnosis-therapy-outcome
#15
Friedrich Reichert, Peter Amrhein, Frank Uhlemann
A 7 week old infant was admitted with respiratory failure. Chest X-ray showed an atelectatic right upper lobe, herniation of right middle and lower lobe into the left thorax, and compression-atelectasis of the left lung. Thoracic CT showed complete occlusion of the right superior bronchus with a radiopaque foreign material. Six weeks prior, an impression for a palate plate using polyvinylsiloxane was taken. The material was removed with a rigid endoscopy, in readiness of extracorporeal oxygenation in case of tracheal obstruction or bronchial rupture...
April 25, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28438750/intradiaphragmatic-hybrid-lesion-surgical-decision-making-and-value-of-minimal-invasive-surgery
#16
Blanca Schuster, Stefan Gerhard Holland-Cunz, Peter Zimmermann
Hybrid lesions (HLs) have elements of congenital pulmonary airway malformation and extrapulmonary sequestration (EPS) and belong to the congenital lung lesions. EPS usually arises in the thorax or the abdomen but rarely in the diaphragm. The preoperative diagnostic work-up based on chest radiograph, ultrasound (US) and CT often shows imprecise results. Therefore, the exact localisation of the lesion can only be ascertained intraoperatively. Here we present a patient, with an intradiaphragmatic HL, and demonstrate the difficulties of surgical decision making regarding the localisation of the lesion and discuss the value of minimal invasive surgery...
April 23, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28437516/a-rare-case-of-misdiagnosed-silent-lung-cancer-with-solitary-metastasis-to-the-temporomandibular-joint-condyle
#17
Luca Guarda-Nardini, Edoardo Stellini, Adolfo Di Fiore, Daniele Manfredini
This article describes the case history of a 59-year-old female patient who sought advice for temporomandibular joint (TMJ) pain and sounds but who was actually diagnosed with a primary lung cancer with metastasis to the TMJ. The patient had a history of TMJ pain and deflection in jaw movement that progressively worsened over a few months and did not improve with the usual standard of care treatment provided by an orofacial pain practitioner. Magnetic resonance and computed tomography (CT) prescribed at a tertiary clinic showed an osteolytic bone mass within the right TMJ condyle...
April 2017: Journal of Oral & Facial Pain and Headache
https://www.readbyqxmd.com/read/28436852/frequency-selective-computed-tomography-applications-during-periodic-thoracic-motion
#18
Jacob Herrmann, Eric A Hoffman, David W Kaczka
We seek to use computed tomography (CT) to characterize regional lung parenchymal deformation during highfrequency and multi-frequency oscillatory ventilation. Periodic motion of thoracic structures results in artifacts of CT images obtained by standard reconstruction algorithms, especially for frequencies exceeding that of the X-ray source rotation. In this study, we propose an acquisition and reconstruction technique for high resolution imaging of the thorax during periodic motion. Our technique relies on phase-binning projections according to the frequency of subject motion relative to the scanner rotation, prior to volumetric reconstruction...
April 18, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28432407/the-arterial-supply-of-the-nipple-areola-complex-nac-and-its-relations-an-analysis-of-angiographic-ct-imaging-for-breast-pedicle-design
#19
Aaron D Stirling, Conor P Murray, Mark A Lee
PURPOSE: To investigate the blood supply to the nipple areola complex (NAC) on thoracic CT angiograms (CTA) to improve breast pedicle design in reduction mammoplasty. METHODS: In a single centre, CT scans of the thorax were retrospectively reviewed for suitability by a cardiothoracic radiologist. Suitable scans had one or both breasts visible in extended fields, with contrast enhancement of breast vasculature in a female patient. The arterial sources, intercostal space perforated, glandular/subcutaneous course, vessel entry point, and the presence of periareolar anastomoses were recorded for the NAC of each breast...
April 21, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28423624/assessment-of-female-breast-dose-for-thoracic-cone-beam-ct-using-mosfet-dosimeters
#20
Wenzhao Sun, Bin Wang, Bo Qiu, Jian Liang, Weihao Xie, Xiaowu Deng, Zhenyu Qi
OBJECTIVE: To assess the breast dose during a routine thoracic cone-beam CT (CBCT) check with the efforts to explore the possible dose reduction strategy. MATERIALS AND METHODS: Metal oxide semiconductor field-effect transistor (MOSFET) dosimeters were used to measure breast surface doses during a thorax kV CBCT scan in an anthropomorphic phantom. Breast doses for different scanning protocols and breast sizes were compared. Dose reduction was attempted by using partial arc CBCT scan with bowtie filter...
March 21, 2017: Oncotarget
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