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CT imaging, increasing accuracy

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https://www.readbyqxmd.com/read/29340798/diagnostic-implications-of-a-small-voxel-reconstruction-for-loco-regional-lymph-node-characterization-in-breast-cancer-patients-using-fdg-pet-ct
#1
Daniëlle Koopman, Jorn A van Dalen, Hester Arkies, Ad H J Oostdijk, Anne Brecht Francken, Jos Bart, Cornelis H Slump, Siert Knollema, Pieter L Jager
BACKGROUND: We evaluated the diagnostic implications of a small-voxel reconstruction for lymph node characterization in breast cancer patients, using state-of-the-art FDG-PET/CT. We included 69 FDG-PET/CT scans from breast cancer patients. PET data were reconstructed using standard 4 × 4 × 4 mm3 and small 2 × 2 × 2 mm3 voxels. Two hundred thirty loco-regional lymph nodes were included, of which 209 nodes were visualised on PET/CT. All nodes were visually scored as benign or malignant, and SUVmax and TBratio(=SUVmax/SUVbackground) were measured...
January 16, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/29340290/tailoring-four-dimensional-cone-beam-ct-acquisition-settings-for-fiducial-marker-based-image-guidance-in-radiation-therapy
#2
Peng Jin, Niek van Wieringen, Maarten C C M Hulshof, Arjan Bel, Tanja Alderliesten
Use of four-dimensional cone-beam CT (4D-CBCT) and fiducial markers for image guidance during radiation therapy (RT) of mobile tumors is challenging due to the trade-off among image quality, imaging dose, and scanning time. This study aimed to investigate different 4D-CBCT acquisition settings for good visibility of fiducial markers in 4D-CBCT. Using these 4D-CBCTs, the feasibility of marker-based 4D registration for RT setup verification and manual respiration-induced motion quantification was investigated...
April 2018: Journal of Medical Imaging
https://www.readbyqxmd.com/read/29329996/to-prep-or-not-to-prep-that-is-the-question-a-randomized-trial-on-the-use-of-antiflatulent-medication-as-part-of-bowel-preparation-for-patients-having-image-guided-external-beam-radiation-therapy-to-the-prostate
#3
Merrylee McGuffin, Naila Devji, Lyann Kehoe, Anne Carty, Steve Russell, Lisa Di Prospero, Carlo DeAngelis, Alex Kiss, Danny Vesprini, Andrew Loblaw, Laura D'Alimonte
INTRODUCTION: Radiation therapy is a standard treatment option for prostate cancer. With growing use of escalated doses and tighter margins, procedures to limit rectal size variation are needed to reduce prostate motion, increase treatment accuracy, and minimize rectal toxicity. This prospective study was done to determine whether the introduction of an antiflatulent medication would decrease rectal distention at computed tomography (CT) simulation and throughout a course of radiation therapy...
November 4, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/29327247/comparing-different-modalities-for-the-diagnosis-of-incisional-hernia-a-systematic-review
#4
REVIEW
L F Kroese, D Sneiders, G J Kleinrensink, F Muysoms, J F Lange
PURPOSE: Incisional hernia (IH) is the most frequent complication after abdominal surgery. The diagnostic modality, observer, definition, and diagnostic protocol used for the diagnosis of IH potentially influence the reported prevalence. The objective of this systematic review is to evaluate the diagnostic accuracy of different modalities used to identify IH. METHODS: Embase, MEDLINE OvidSP, Web of Science, Google Scholar, and Cochrane databases were searched to identify studies diagnosing IH...
January 11, 2018: Hernia: the Journal of Hernias and Abdominal Wall Surgery
https://www.readbyqxmd.com/read/29325350/-the-current-status-of-diagnosis-and-treatment-of-pancreatic-cystic-neoplasm-in-china-a-report-of-2-251-cases
#5
(no author information available yet)
Objective: To analyze the current status of diagnosis and treatment of pancreatic cystic neoplasm(PCN)in China. Methods: Clinical data of 2 251 PCN patients who underwent surgical resection from January 2006 to December 2016 in 16 institutions was retrospectively analyzed.Excel database was created which covered 132 fields of 7 fields: general information of patients, imaging findings, preoperative blood biochemical indexes, tumor markers, surgical related data, postoperative complications and pathology. Results: Of the 2 251 patients, the male to female ratio was 1...
January 1, 2018: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29318965/current-status-of-molecular-imaging-in-infections
#6
Martina Sollini, Chiara Lauri, Roberto Boni, Elena Lazzeri, Paola Anna Erba, Alberto Signore
There is an increased need to find non-invasive tools for early diagnosis and follow-up of infections. Nuclear medicine techniques may be used to diagnose, localize and evaluate the severity and the extent of infections before the occurrence of anatomical abnormalities. This review focuses on different approaches based on radiolabelled cells, peptides and antibodies or [18F]FDG to image infective diseases in agreement with what is being jointly evaluated by the European Association of Nuclear Medicine (EANM)...
January 9, 2018: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29313371/utility-of-3-month-surveillance-f-18-fdg-pet-ct-in-surgically-resected-oral-squamous-cell-carcinoma
#7
Michael Marquardt, Carryn Anderson, Timothy Ginader, Jessica Parkhurst, Nitin Pagedar, Rodrigo Bayon, Gerald Clamon, Andrew Hoover, John Buatti
OBJECTIVES: To evaluate the performance of surveillance F-18 fluorodeoxyglucose positron emission tomography/computed tomography (PET/CT) 1 year after imaging in oral squamous cell carcinoma (OSCC) patients treated with definitive surgery and adjuvant (chemo)radiotherapy (RT). METHODS AND MATERIALS: Surveillance PET/CT accuracy was retrospectively evaluated in OSCC patients receiving surgical resection and (chemo)RT. Pathologic risk factors were assessed for influence on accuracy of the post-RT PET/CT...
January 1, 2018: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/29311420/computer-aided-diagnosis-of-lung-cancer-the-effect-of-training-datasets-on-classification-accuracy-of-lung-nodules
#8
Jing Gong, Ji-Yu Liu, Xi-Wen Sun, Bin Zheng, Sheng-Dong Nie
This study aims to develop a computer-aided diagnosis (CADx) scheme for classification between malignant and benign lung nodules, and also assess whether CADx performance changes in detecting nodules associated with early and advanced stage lung cancer. Methods: The study involves 243 biopsy-confirmed pulmonary nodules. Among them, 76 are benign, 81 are stage I and 86 are stage III malignant nodules. Cases are partitioned into 3 datasets involving: (1) all nodules, (2) benign and stage I malignant nodules, and (3) benign and stage III malignant nodules...
January 9, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29307167/clinical-value-of-18f-fdg-pet-ct-and-3d-black-blood-3t-mri-for-the-diagnosis-of-large-vessel-vasculitis-and-single-organ-vasculitis-of-the-aorta
#9
Vera Wenter, Nora N Sommer, Hendrik Kooijman, Stefan Maurus, Marcus Treitl, Michael Czihal, Claudia Dechant, Marcus Unterrainer, Nathalie L Albert, Karla M Treitl
BACKGROUND: We aimed to investigate the clinical value of a 3D-T1w turbo-spin-echo (TSE) sequence and [18F]fluorodeoxyglucose positron emission tomography / computed tomography ([18F]FDG- PET/CT) for the diagnosis of active large vessel vasculitis (LVV) and single-organ vasculitis (SOV) of the aorta. METHODS: 24 patients with suspected vasculitis who underwent MRI and PET/CT were retrospectively evaluated. MRI was analyzed for concentric contrast enhancement and wall thickening, and flow artifact intensity (4-point-scales)...
January 2, 2018: Quarterly Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29282579/accuracy-of-outside-radiologists-reports-of-computed-tomography-exams-of-emergently-transferred-patients
#10
Jeffrey D Robinson, Ken F Linnau, Daniel S Hippe, Kellie L Sheehan, Joel A Gross
PURPOSE: Growing numbers of patient with advanced imaging being transferred to trauma centers has resulted in increased numbers of outside CT scans received at trauma centers. This study examines the degree of agreement between community radiologists' interpretations of the CT scans of transferred patients and trauma center radiologists' reinterpretation. METHODS: All CT scans of emergency transfer patients received over a 1 month period were reviewed by an emergency radiologist...
December 27, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/29260893/accuracy-of-coronary-artery-calcium-scoring-with-tube-current-reduction-by-75-using-an-adaptive-iterative-reconstruction-algorithm
#11
Reny Luhur, Joanne D Schuijf, Jügen Mews, Jörg Blobel, Bernd Hamm, Alexander Lembcke
OBJECTIVE: To assess the accuracy of an iterative reconstruction (IR) technique for coronary artery calcium scoring with reduced radiation dose. METHODS: 163 consecutive patients underwent twofold scanning by 320-row detector computed tomography (CT) at 120 kVp. A low-dose scan at 25% tube current but with standard scan length (14 cm) was followed by a standard dose scan with routine tube current but reduced scan length (10 cm). Reduced dose images were constructed using filtered back-projection (FBP) and IR (adaptive iterative dose reduction in 3 dimensions, or AIDR3D)...
December 20, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/29250564/measuring-arterial-wall-perfusion-using-photon-counting-computed-tomography-ct-improving-ct-number-accuracy-of-artery-wall-using-image-deconvolution
#12
Kishore Rajendran, Shuai Leng, Steven M Jorgensen, Jill L Anderson, Ahmed F Halaweish, Dilbar Abdurakhimova, Erik L Ritman, Cynthia H McCollough
Changes in arterial wall perfusion mark the onset of atherosclerosis. A characteristic change is the increased spatial density of vasa vasorum (VV), the microvessels in the arterial walls. Measuring this increased VV (IVV) density using contrast-enhanced computed tomography (CT) has had limited success due to blooming effects from contrast media. If the system point-spread function (PSF) is known, then the blooming effect can be modeled as a convolution between the true signal and the PSF. We report the application of image deconvolution to improve the CT number accuracy in the arterial wall of a phantom and in a porcine model of IVV density, both scanned using a whole-body research photon-counting CT scanner...
October 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/29250499/utility-of-radiographs-computed-tomography-and-three-dimensional-computed-tomography-pelvis-reconstruction-for-identification-of-acetabular-defects-in-residency-training
#13
Johannes F Plate, John S Shields, Maxwell K Langfitt, Michael P Bolognesi, Jason E Lang, Thorsten M Seyler
Purpose: The Paprosky classification system of acetabular defects is complex and its reliability has been questioned. The purpose of this study was to evaluate the effectiveness of different radiologic imaging modalities in classifying acetabular defects in revision total hip arthroplasty (THA) and their value of at different levels of training. Materials and Methods: Bone defects in 8 revision THAs were classified by 2 fellowship-trained adult reconstruction surgeons...
December 2017: Hip & Pelvis
https://www.readbyqxmd.com/read/29249078/concordance-between-fine-needle-aspiration-and-core-biopsies-for-osseous-lesions-by-lesion-imaging-appearance-and-ct-attenuation
#14
John Li, Zoe Weissberg, Thomas A Bevilacqua, Gordon Yu, Kristy Weber, Ronnie Sebro
OBJECTIVES: To compare the concordance between fine-needle aspiration and core biopsies for osseous lesions by lesion imaging appearance and CT attenuation. MATERIALS AND METHODS: Retrospective review of 215 FNAs of osseous lesions performed in conjunction with core biopsy at our institution over a 6-year period (2011-2016). FNAs were interpreted independently of core biopsies. We assessed if FNA in conjunction with core biopsy increased diagnostic accuracy compared to core biopsy alone...
December 16, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/29232805/value-of-imaging-study-in-predicting-pelvic-lymph-node-metastases-of-uterine-cervical-cancer
#15
Wonguen Jung, Kyung Ran Park, Kyung-Ja Lee, Kyubo Kim, Jihae Lee, Songmi Jeong, Yi-Jun Kim, Jiyoung Kim, Hai-Jeon Yoon, Byung-Chul Kang, Hae Soo Koo, Sun Hee Sung, Min-Sun Cho, Sanghui Park
Purpose: To evaluate the diagnostic accuracy of computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography/computed tomography (PET/CT) in predicting pelvic lymph node (LN) metastases in patients with cervical cancer. Materials and Methods: From January 2009 to March 2015, 114 patients with FIGO stage IA1-IIB uterine cervical cancer who underwent hysterectomy with pelvic lymphadenectomy and took CT, MRI, and PET/CT before surgery were enrolled in this study...
December 15, 2017: Radiation Oncology Journal
https://www.readbyqxmd.com/read/29230009/the-use-of-pet-ct-in-prostate-cancer
#16
REVIEW
Roger Li, Gregory C Ravizzini, Michael A Gorin, Tobias Maurer, Matthias Eiber, Matthew R Cooperberg, Mehrdad Alemozzaffar, Matthew K Tollefson, Scott E Delacroix, Brian F Chapin
BACKGROUND: Positron emission tomography/computed tomography (PET/CT) has recently emerged as a promising diagnostic imaging platform for prostate cancer. Several radiolabelled tracers have demonstrated efficacy for cancer detection in various clinical settings. In this review, we aim to illustrate the diverse use of PET/CT with different tracers for the detection of prostate cancer. METHODS: We searched MEDLINE using the terms 'prostate cancer', 'PET', 'PET/CT' and 'PET/MR')...
December 11, 2017: Prostate Cancer and Prostatic Diseases
https://www.readbyqxmd.com/read/29227998/the-value-of-squamous-cell-carcinoma-antigen-scca-to-determine-the-lymph-nodal-metastasis-in-cervical-cancer-a-meta-analysis-and-literature-review
#17
Ziqi Zhou, Wenbo Li, Fuquan Zhang, Ke Hu
BACKGROUND: The diagnostic power of CT or MRI on the lymph node status was limited. Supplement measurements were needed to assist the diagnosis of lymph node metastasis. The SCCa was reported to be close related to lymph node status. But currently the clinical value of serum SCCa measurement in lymph node status has not been clearly defined. This meta-analysis was to investigate this topic on a large scale. METHOD: Searching the Pubmed, Embase, Cochrane library, CNKI and Wanfang database for SCC-Ag/SCCA/SCC-antigen and cervical cancer/tumor/carcinoma/neoplasm published in any language from Jan 1 1990 to Aug 1 2017...
2017: PloS One
https://www.readbyqxmd.com/read/29225127/case-report-simultaneous-endovascular-repair-of-a-thoracic-aortic-injury-during-posterior-pedicle-screw-removal
#18
Serena Martin, Richard Lindsay, Robin C Baker
INTRODUCTION: Posterior spinal stabilisation is a technically demanding procedure which is increasing in popularity. Since this increase in popularity, complications, including screws misplacement, are being highlighted. Accuracy rates are higher when imaging modalities are used intra-operatively. Vascular injuries following posterior spinal stabilisation are rare and are usually discovered late on subsequent imaging. Immediate peri-operative compromise is rare, but nonetheless, resultant vascular injuries can be life threatening...
December 7, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29224303/-atypical-computed-tomography-manifestations-of-thoracic-sarcoidosis
#19
J Ma, Y C Wang, X W Sun, C Y Sun
Objective: This study evaluated the atypical computed tomography (CT) manifestations of thoracic sarcoidosis. Methods: Medical data of 190 patients with thoracic sarcoidosis were retrospectively reviewed. Results: The atypical CT manifestations of thoracic sarcoidosis observed were unilateral hilar lymphadenopathy with or without mediastinal lymphadenopathy(n=12, 6.3%), mediastinal lymphadenopathy without hilar lymphadenopathy(n=9, 4.7%), patchy consolidation (n=23, 12.1%), sarcoid galaxy sign (n=22, 11.6%), reversed halo sign (n=1, 0...
December 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/29218270/anatomic-functional-and-molecular-imaging-in-lung-cancer-precision-radiation-therapy-treatment-response-assessment-and-radiation-therapy-personalization
#20
REVIEW
Michael MacManus, Sarah Everitt, Tanja Schimek-Jasch, X Allen Li, Ursula Nestle, Feng-Ming Spring Kong
This article reviews key imaging modalities for lung cancer patients treated with radiation therapy (RT) and considers their actual or potential contributions to critical decision-making. An international group of researchers with expertise in imaging in lung cancer patients treated with RT considered the relevant literature on modalities, including computed tomography (CT), magnetic resonance imaging (MRI) and positron emission tomography (PET). These perspectives were coordinated to summarize the current status of imaging in lung cancer and flag developments with future implications...
December 2017: Translational Lung Cancer Research
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