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https://www.readbyqxmd.com/read/29146418/diagnostic-accuracy-of-the-extended-focused-abdominal-sonography-for-trauma-e-fast-performed-by-emergency-physicians-compared-to-computed-tomography
#1
Haldun Akoglu, Omer Faruk Celik, Ali Celik, Rabia Ergelen, Ozge Onur, Arzu Denizbasi
INTRODUCTION: The diagnostic accuracy of the FAST exam performed by EM residents were shown to be similar to radiology residents. However, in the last 2 decades, an extended-FAST (E-FAST) protocol including thoracic examination to exclude pneumo- and hemothorax was introduced. The accuracy of emergency physicians (EPs) while performing E-FAST is a less studied area, especially in Europe. The aim of this study was to compare the diagnostic accuracy of the E-FAST exam performed by EM residents with the results of CT scan as a gold standard...
November 8, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29145324/a-rare-case-of-merkel-cell-carcinoma-presenting-as-a-giant-intra-thoracic-mass-a-case-report-and-review-of-the-literature
#2
Feng-Wei Kong, Miao Zhang, Heng Wang, Cun-Tao Lu, Wen-Bin Wu, Yuan-Yuan Liu
RATIONALE: Merkel cell carcinoma (MCC) is an aggressive neuroendocrine-derived cutaneous cancer. Ectopic or single metastatic MCC located in thorax is extremely rare; meanwhile, its definite management has not been elucidated yet. PATIENT CONCERNS: A 64-year-old female patient with a giant mass located in her left thorax was presented for stuffy pain of left chest for 6 months and fever for half a month. She underwent radical resection of vulvar MCC 10 years ago...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29137108/tuberculosis-presenting-as-isolated-bronchonodal-fistula-in-a-patient-with-systemic-lupus-erythematosus-case-report
#3
Kyungsoo Bae, Kyung Nyeo Jeon, Ho Cheol Kim, Young Sun Suh, Gi Dong Lee, Ju-Young Kim, Dae Hyun Song
RATIONALE: Lymph node is a preferred site for extrapulmonary tuberculosis (TB). In the thorax, mediastinal tuberculous lymph nodes can erode adjacent structures such as heart, aorta, and esophagus, forming fistula, and causing fatal consequences. However, tuberculous bronchonodal fistula as a complication of lymph node TB in adults is rarely known in terms of imaging or clinical findings. Here, a case of isolated tuberculous bronchonodal fistula appearing as the first presentation of TB in a 74-year-old male with systemic lupus erythematosus (SLE) is reported...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29125857/phantom-based-evaluation-of-dose-exposure-of-ultrafast-combined-kv-mv-cbct-towards-clinical-implementation-for-igrt-of-lung-cancer
#4
Anna Arns, Manuel Blessing, Jens Fleckenstein, Dzmitry Stsepankou, Judit Boda-Heggemann, Juergen Hesser, Frank Lohr, Frederik Wenz, Hansjoerg Wertz
PURPOSE: Combined ultrafast 90°+90° kV-MV-CBCT within single breath-hold of 15s has high clinical potential for accelerating imaging for lung cancer patients treated with deep inspiration breath-hold (DIBH). For clinical feasibility of kV-MV-CBCT, dose exposure has to be small compared to prescribed dose. In this study, kV-MV dose output is evaluated and compared to clinically-established kV-CBCT. METHODS: Accurate dose calibration was performed for kV and MV energy; beam quality was determined...
2017: PloS One
https://www.readbyqxmd.com/read/29107992/software-assisted-dosimetry-in-peptide-receptor-radionuclide-therapy-with-177lutetium-dotatate-for-various-imaging-scenarios
#5
Dennis Kupitz, Christoph Wetz, Heiko Wissel, Florian Wedel, Ivayla Apostolova, Thekla Wallbaum, Jens Ricke, Holger Amthauer, Oliver S Grosser
In peptide receptor radionuclide therapy (PRRT) of patients with neuroendocrine neoplasias (NENs), intratherapeutic dosimetry is mandatory for organs at risk (e.g. kidneys) and tumours. We evaluated commercial dosimetry software (Dosimetry Toolkit) using varying imaging scenarios, based on planar and/or tomographic data, regarding the differences in calculated organ/tumour doses and the use for clinical routines. A total of 16 consecutive patients with NENs treated by PRRT with 177Lu-DOTATATE were retrospectively analysed...
2017: PloS One
https://www.readbyqxmd.com/read/29105797/-99m-tc-mip-1404-spect-ct-for-the-detection-of-psma-positive-lesions-in-225-patients-with-biochemical-recurrence-of-prostate-cancer
#6
Christian Schmidkonz, Claudia Hollweg, Michael Beck, Julia Reinfelder, Theresa I Goetz, James C Sanders, Daniela Schmidt, Olaf Prante, Tobias Bäuerle, Alexander Cavallaro, Michael Uder, Bernd Wullich, Peter Goebell, Torsten Kuwert, Philipp Ritt
BACKGROUND: (99m) Tc-MIP-1404 (Progenics Pharmaceuticals, Inc., New York, NY) is a novel, SPECT-compatible (99m) Tc-labeled PSMA inhibitor for the detection of prostate cancer. We present results of its clinical use in a cohort of 225 men with histologically confirmed prostate cancer referred for workup of biochemical relapse. METHODS: From April 2013 to April 2017, (99m) Tc-MIP1404-scintigraphy was performed in 225 patients for workup of PSA biochemical relapse of prostate cancer...
November 6, 2017: Prostate
https://www.readbyqxmd.com/read/29101266/a-59-year-old-woman-with-visible-precordial-pulsations
#7
Alastair J Moss, Renzo Pessotto, Andrew D Flapan
CLINICAL INTRODUCTION: A retired 59-year-old woman presented to the cardiology clinic concerned with cardiac pulsations that were visible on her chest wall. These were not associated with dyspnoea, syncope or chest discomfort.Of note, 8 years previously, she complained of recurrent nocturnal diaphoresis and 5 kg weight loss. Blood sampling at that time revealed a microcytic anaemia, reactive thrombocytosis and raised inflammatory markers (erythrocyte sedimentation rate 99 mm/hour, C-reactive protein 161 mg/L)...
November 3, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29095996/optimum-size-of-a-calibration-phantom-for-x-ray-ct-to-convert-the-hounsfield-units-to-stopping-power-ratios-in-charged-particle-therapy-treatment-planning
#8
T Inaniwa, H Tashima, N Kanematsu
In charged-particle therapy treatment planning, the volumetric distribution of stopping power ratios (SPRs) of body tissues relative to water is used for patient dose calculation. The distribution is conventionally obtained from computed tomography (CT) images of a patient using predetermined conversion functions from the CT numbers to the SPRs. One of the biggest uncertainty sources of patient SPR estimation is insufficient correction of beam hardening arising from the mismatch between the size of the patient cross section and the calibration phantom for producing the conversion functions...
October 31, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/29091278/using-3d-printing-techniques-to-create-an-anthropomorphic-thorax-phantom-for-medical-imaging-purposes
#9
Colien Hazelaar, Maureen van Eijnatten, Max Dahele, Jan Wolff, Tymour Forouzanfar, Ben Slotman, Wilko F A R Verbakel
PURPOSE: Imaging phantoms are widely used for testing and optimization of imaging devices without the need to expose humans to irradiation. However, commercially available phantoms are commonly manufactured in simple, generic forms and sizes and therefore do not resemble the clinical situation for many patients. METHODS: Using 3D printing techniques, we created a life-size phantom based on a clinical CT scan of the thorax from a patient with lung cancer. It was assembled from bony structures printed in gypsum, lung structures consisting of airways, blood vessels >1 mm, and outer lung surface, three lung tumors printed in nylon, and soft tissues represented by silicone (poured into a 3D printed mold)...
November 1, 2017: Medical Physics
https://www.readbyqxmd.com/read/29083311/-effective-dose-from-pediatric-ct-in-iceland
#10
Jonina Gudjonsdottir, Arna Bjork Jonsdottir
INTRODUCTION: It is important to know the effective dose from computed tomography (CT) examinations. The aim of this study was to evaluate the effective dose from pediatric CT examinations in Iceland. MATERIALS AND METHOD: For all pediatric CT exams (children < 18 years) performed during one year (1.2.2016 till 1.2.2017), data on age, examination type and dose length product was retrospectively collected from the Landspitali University Hospital's archives, as was the total number of CT examinations...
November 2017: Læknablađiđ
https://www.readbyqxmd.com/read/29082213/reducing-radiation-doses-in-female-breast-and-lung-during-ct-examinations-of-thorax-a-new-technique-in-two-scanners
#11
P Mehnati, M Ghavami, H Heidari
BACKGROUND: Chest CT is a commonly used examination for the diagnosis of lung diseases, but a breast within the scanned field is nearly never the organ of interest. OBJECTIVE: The purpose of this study is to compare the female breast and lung doses using split and standard protocols in chest CT scanning. MATERIALS AND METHODS: The sliced chest and breast female phantoms were used. CT exams were performed using a single-slice (SS)- and a 16 multi-slice (MS)- CT scanner at 100 kVp and 120 kVp...
September 2017: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/29065887/computed-tomography-of-the-thorax-in-rabbits-a-prospective-study-in-ten-clinically-healthy-new-zealand-white-rabbits
#12
Désirée Müllhaupt, Sandra Wenger, Patrick Kircher, Nadja Pfammatter, Jean-Michel Hatt, Stefanie Ohlerth
BACKGROUND: Literature investigating the normal cross-sectional anatomy of rabbits with computed tomography (CT) is sparse and incomplete. The purpose of the present study was to investigate the normal thoracic structures, in particular the cranial thorax, with CT angiography in 10 clinically healthy New Zealand White (NZW) rabbits. RESULTS: Absolute and relative measurements of the trachea, heart, thoracic caudal vena cava and aorta, right and left principal bronchi, right and left caudal lobar bronchi and the accompanying branches of the right and left pulmonary artery and vein, right and left lung volume and lung density were taken...
October 24, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/29062466/segmentation-of-organs-at-risk-in-thoracic-ct-images-using-a-sharpmask-architecture-and-conditional-random-fields
#13
R Trullo, C Petitjean, S Ruan, B Dubray, D Nie, D Shen
Cancer is one of the leading causes of death worldwide. Radiotherapy is a standard treatment for this condition and the first step of the radiotherapy process is to identify the target volumes to be targeted and the healthy organs at risk (OAR) to be protected. Unlike previous methods for automatic segmentation of OAR that typically use local information and individually segment each OAR, in this paper, we propose a deep learning framework for the joint segmentation of OAR in CT images of the thorax, specifically the heart, esophagus, trachea and the aorta...
April 2017: Proceedings of the IEEE International Symposium on Biomedical Imaging: from Nano to Macro
https://www.readbyqxmd.com/read/29031479/the-optimum-chest-compression-site-with-regard-to-heart-failure-demonstrated-by-computed-tomography
#14
Keunha Hwang, Sung-Bin Chon, Jung Gi Im
BACKGROUND: To determine the optimum chest compression site during cardiopulmonary resuscitation (CPR) with regard to heart failure (HF) by applying three-dimensional (3D) coordinates on computed tomography (CT). METHODS: This retrospective, cross-sectional study involved adults who underwent echocardiography and CT on the same day from 2007 to 2017. Incomplete CT images or information on HF, cardiac medication between echocardiography and CT, or thoracic abnormalities were excluded...
July 13, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29029203/prognostic-significance-of-computed-tomography-criteria-for-pulmonary-veno-occlusive-disease-in-systemic-sclerosis-pulmonary-arterial-hypertension
#15
Michelle J Connolly, Sharif Abdullah, Deborah A Ridout, Benjamin E Schreiber, Jamanda A Haddock, J Gerry Coghlan
Objectives: SSc-pulmonary arterial hypertension (SSc-PAH) is associated with worse response to therapy and survival when compared with idiopathic PAH. It is suggested that the vasculopathy in SSc may involve postcapillary pulmonary venules resulting in pulmonary veno-occlusive disease (PVOD). This may underlie the lower gas transfer and worse outcome on therapy. We sought to test whether CT signs of PVOD (CTS-PVOD) were frequent in SSc-PAH and whether they were associated with pulmonary oedema on therapy and worse survival...
September 26, 2017: Rheumatology
https://www.readbyqxmd.com/read/29017220/-bronchitis-plastica-acute-dyspnea-and-branching-airway-casts
#16
P Wischmann, S Keymel, M Kelm, S Krüger
A 65 year old female presented to the emergency department with dyspnea and progressive cough with very viscous elongated secretion plugs. She suffered from multiple cardiac comorbidities and chronic heart failure. The CT scan of the thorax demonstrated extensive pulmonary infiltrates, unspecific mediastinal lymphadenopathy and enlargement of pulmonary lymph vessels. Bronchoscopy was performed and showed extensive occlusive bronchial casts. We diagnosed a case of bronchitis plastica. Therapy with inhalative heparin led to clinical improvement...
October 2017: Pneumologie
https://www.readbyqxmd.com/read/28975586/impact-of-treatment-delay-in-radium-223-therapy-of-metastatic-castration-resistant-prostate-cancer-patients
#17
Marie Øbro Fosbøl, Peter Meidahl Petersen, Gedske Daugaard, Søren Holm, Andreas Kjaer, Jann Mortensen
BACKGROUND: Radium-223-dichloride (Ra-223) is an alpha-emitting, bone seeking radionuclide therapy approved for patients with metastatic castration-resistant prostate cancer (mCRPC). In the fall of 2014, a global temporary shortage of Ra-223 occurred for 2 months due to production irregularities. The aim of this study was to assess whether prolonged interval between Ra-223 cycles to non-disease related causes had a negative impact on clinical outcome of therapy. MATERIALS AND METHODS: Retrospective single-center study of mCRPC patients who initiated Ra-223 therapy in the period from March 2014 to February 2015...
October 3, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28954638/-a-lung-abscess-caused-by-bad-teeth
#18
S E van Brummelen, D Melles, M van der Eerden
BACKGROUND: An odontogenic cause of a lung abscess can easily be overlooked. CASE DESCRIPTION: A 61-year-old man presented at the emergency department with a productive cough and dyspnoea. He was admitted to the pulmonary ward with a suspected odontogenic lung abscess. A thorax CT scan confirmed the diagnosis 'lung abscess', following which the dental surgeon confirmed that the lung abscess probably had an odontogenic cause. The patient made a full recovery following a 6-week course of antibiotics, and he received extensive dental treatment...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28952463/a-monte-carlo-study-of-organ-and-effective-doses-of-cone-beam-computed-tomography-cbct-scans-in-radiotherapy
#19
Abdullah Abuhaimed, Colin J Martin, Marimuthu Sankaralingam
Cone-beam CT (CBCT) scans utilized for image guided radiation therapy (IGRT) procedures have become an essential part of radiotherapy. The aim of this study was to assess organ and effective doses resulting from new CBCT scan protocols (head, thorax, and pelvis) released with a software upgrade of the kV on-board-imager (OBI) system. Influence of the scan parameters that were changed in the new protocols on the patient dose was also investigated. Organ and effective doses for protocols of the new software (V2...
September 27, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28946909/ct-imaging-features-associated-with-recurrence-in-non-small-cell-lung-cancer-patients-after-stereotactic-body-radiotherapy
#20
Qian Li, Jongphil Kim, Yoganand Balagurunathan, Jin Qi, Ying Liu, Kujtim Latifi, Eduardo G Moros, Matthew B Schabath, Zhaoxiang Ye, Robert J Gillies, Thomas J Dilling
BACKGROUND: Predicting recurrence after stereotactic body radiotherapy (SBRT) in non-small cell lung cancer (NSCLC) patients is problematic, but critical for the decision of following treatment. This study aims to investigate the association of imaging features derived from the first follow-up computed tomography (CT) on lung cancer patient outcomes following SBRT, and identify patients at high risk of recurrence. METHODS: Fifty nine biopsy-proven non-small cell lung cancer patients were qualified for this study...
September 25, 2017: Radiation Oncology
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