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CT scan head imaging

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https://www.readbyqxmd.com/read/28822414/-prevalence-of-tonsilloliths-and-ct-diagnosis
#1
C L Yu, L X Tao, X H Li, Y Q Yu, B Liu
Objective: To investigate the prevalence, gender and age distribution characteristics of tonsilloliths and its CT diagnosis, in order to improve the knowledge of clinicians. Methods: The images of 2 710 patients who underwent head and neck CT scans from November 2015 to November 2016 were retrospectively reviewed, the prevalence, gender and age distribution of tonsilloliths and CT manifestation were analyzed. SPSS 18.0 was used for statistical analysis. Results: Tonsilloliths were found in 383 (14.1%) of the 2 710 patients, including 217 men and 166 women...
August 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28819936/introducing-navigation-during-melanoma-related-sentinel-lymph-node-procedures-in-the-head-and-neck-region
#2
Gijs H KleinJan, Baris Karakullukçu, W Martin C Klop, Thijs Engelen, Nynke S van den Berg, Fijs W B van Leeuwen
BACKGROUND: Intraoperative sentinel node (SN) identification in patients with head-and-neck malignancies can be challenging due to unexpected drainage patterns and anatomical complexity. Here, intraoperative navigation-based guidance technologies may provide outcome. In this study, gamma camera-based freehandSPECT was evaluated in combination with the hybrid tracer ICG-(99m)Tc-nanocolloid. MATERIALS AND METHODS: Eight patients with melanoma located in the head-and-neck area were included...
August 17, 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28814795/direct-comparison-of-pet-ct-and-mri-to-predict-the-pathological-response-to-neoadjuvant-chemotherapy-in-breast-cancer-a-meta-analysis
#3
Lihua Chen, Qifang Yang, Jing Bao, Daihong Liu, Xuequan Huang, Jian Wang
Both PET/CT and breast MRI are used to assess pathological complete response to neoadjuvant chemotherapy (NAC) in patients with breast cancer. The aim is to compare the utility of PET/CT and breast MRI by using head-to-head comparative studies. Literature databases were searched prior to July 2016. Eleven studies with a total of 527 patients were included. For PET/CT, the pooled SEN was 0.87 (95% confidence interval (CI): 0.71-0.95) and SPE was 0.85 (95% CI: 0.70-0.93). For MRI, the pooled SEN was 0.79 (95% CI: 0...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28813561/comparison-of-coronary-ct-angiography-spect-pet-and-hybrid-imaging-for-diagnosis-of-ischemic-heart-disease-determined-by-fractional-flow-reserve
#4
Ibrahim Danad, Pieter G Raijmakers, Roel S Driessen, Jonathon Leipsic, Rekha Raju, Chris Naoum, Juhani Knuuti, Maija Mäki, Richard S Underwood, James K Min, Kimberly Elmore, Wynand J Stuijfzand, Niels van Royen, Igor I Tulevski, Aernout G Somsen, Marc C Huisman, Arthur A van Lingen, Martijn W Heymans, Peter M van de Ven, Cornelis van Kuijk, Adriaan A Lammertsma, Albert C van Rossum, Paul Knaapen
Importance: At present, the choice of noninvasive testing for a diagnosis of significant coronary artery disease (CAD) is ambiguous, but nuclear myocardial perfusion imaging with single-photon emission tomography (SPECT) or positron emission tomography (PET) and coronary computed tomography angiography (CCTA) is predominantly used for this purpose. However, to date, prospective head-to-head studies are lacking regarding the diagnostic accuracy of these imaging modalities. Furthermore, the combination of anatomical and functional assessments configuring a hybrid approach may yield improved accuracy...
August 16, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28812226/in-light-of-recently-published-clinical-trials-and-their-implication-for-clinical-practice-does-a-large-catchment-area-acute-hospital-require-24%C3%A2-hour-ct-neck-and-head-angiography-and-or-neuro-interventional-services-in-the-setting-of-acute-ischaemic-stroke
#5
REVIEW
J Halpin, C Peters, J O'Brien, T Scanlon, M Shelly, N Cunningham, L Hickey
BACKGROUND: Recently published clinical trials have resulted in a significant change in the guidelines used to manage patients suffering an acute ischaemic stroke. New neuro-interventional techniques have revolutionised stroke outcomes. Currently, such services are only available in two specialist centres. AIMS: We attempted to evaluate the need for the provision of routine computed tomography (CT) angiography and neuro-interventional services at a university teaching hospital in Limerick...
August 15, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/28809123/-18-fdg-pet-ct-in-routine-surveillance-of-asymptomatic-patients-following-treatment-of-sinonasal-neoplasms
#6
Alan D Workman, Jordan T Glicksman, Arjun K Parasher, Ryan M Carey, Steven G Brooks, David W Kennedy, Seyed A Nabavizadeh, Kim O Learned, James N Palmer, Nithin D Adappa
Objective Sinonasal neoplasms have a high rate of recurrence following treatment, and current guidelines support the use of a variety of surveillance techniques. Recent work demonstrates that performance parameters of surveillance modalities may differ with sinonasal tumors in particular when compared with head and neck tumors overall. This study aims to characterize the value of (18)fluorodeoxyglucose ((18)FDG) positron emission tomography/computed tomography (PET/CT) as a screening tool in asymptomatic patients...
August 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28798032/improved-estrogen-receptor-assessment-by-pet-using-the-novel-radiotracer-4fmfes-in-er-breast-cancer-patients-an-ongoing-phase-ii-clinical-trial
#7
Michel Paquette, Éric Lavallée, Serge Phoenix, René Ouellet, Helena Senta, Johan E van Lier, Brigitte Guérin, Roger Lecomte, Éric E Turcotte
Following encouraging preclinical and human dosimetry results for the novel estrogen receptor (ER) positron emission tomography (PET) radiotracer 4-fluoro-11β-methoxy-16α-[(18)F]fluoroestradiol (4FMFES), a phase II clinical trial was initiated to compare the PET imaging diagnostic potential of 4FMFES to 16α-[(18)F]fluoroestradiol (FES) in ER positive (ER+) breast cancer patients. Methods: Patients diagnosed with ER+ breast cancer (n = 31) were recruited for this study, including six patients that undertook mastectomy and/or axillary node dissection...
August 10, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28780008/the-role-of-positron-emission-tomography-computed-tomography-imaging-in-head-and-neck-cancer-after-radical-chemoradiotherapy-a-single-institution-experience
#8
C Nelissen, J Sherriff, T Jones, P Guest, S Colley, P Sanghera, A Hartley
AIMS: Positron emission tomography/computed tomography (PET/CT) is used to restage head and neck cancer 3 months after chemoradiotherapy. The purpose of this study was to determine the negative predictive value (NPV) of a scan reported as having no abnormal uptake and the positive predictive values (PPV) for different maximum standardised uptake value (SUVmax) thresholds. MATERIALS AND METHODS: Patients with squamous cell carcinoma of the oro-/hypopharynx/larynx (n = 206) were included...
August 2, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28777075/numerical-evaluation-of-the-skull-for-human-neuromodulation-with-transcranial-focused-ultrasound
#9
Jerel K Mueller, Leo Ai, Priya Bansal, Wynn Legon
OBJECTIVE: Transcranial focused ultrasound is an emerging field for human non-invasive neuromodulation, but its dosing in humans is difficult to know due to the skull. The objective of the present study was to establish modeling methods based on medical images to assess skull differences between individuals on the wave propagation of ultrasound. APPROACH: Computational models of transcranial focused ultrasound were constructed using CT and MR scans to solve for intracranial pressure...
August 4, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28774508/compliance-with-evidence-based-guidelines-for-computed-tomography-of-children-with-head-and-abdominal-trauma
#10
Ihab Halaweish, Jane Riebe-Rodgers, Amy Randall, Peter F Ehrlich
INTRODUCTION: Recently, two large prospective clinical trials developed and validated prediction rules for children at very low risk for clinically important traumatic brain injuries (ciTBI) or abdominal injury for whom CT is unnecessary. Specific criteria/guidelines were identified which if met would obviate the need for CT scanning. The purpose of this study was to assess compliance at a level one pediatric center with these guidelines as a tool for quality improvement. METHODS: Records of children admitted to our pediatric trauma center one year before and two years after publication of head (Kuppermann '09) and abdominal trauma (Holmes '13) CT imaging guidelines were reviewed...
July 14, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28771540/18f-fdg-pet-ct-for-the-detection-of-disease-in-patients-with-head-and-neck-cancer-treated-with-radiotherapy
#11
Nils Helsen, Dessie Roothans, Bert Van Den Heuvel, Tim Van den Wyngaert, Danielle Van den Weyngaert, Laurens Carp, Sigrid Stroobants
OBJECTIVE: The aim of this study is to evaluate the diagnostic performance of FDG-PET/CT for the detection of residual disease after (chemo)radiotherapy in patients with head and neck squamous cell carcinoma (HNSCC) and to evaluate the prognostic value of the FDG-PET/CT findings. METHODS: Patients with HNSCC who underwent FDG-PET/CT after (chemo)radiotherapy were studied retrospectively. RESULTS: 104 FDG-PET/CT-scans were performed at a median of 13...
2017: PloS One
https://www.readbyqxmd.com/read/28766885/technical-note-construction-of-heterogeneous-head-phantom-for-quality-control-in-stereotactic-radiosurgery
#12
Mohsen Najafi, Javad Teimouri, Alireza Shirazi, Ghazaleh Geraily, Mahbod Esfahani, Mostafa Shafaei
PURPOSE: Stereotactic radiosurgery is a high precision modality for conformally delivering high doses of radiation to the brain lesion with a large dose volume. Several studies for the quality control of this technique were performed to measure the dose delivered to the target with a homogenous head phantom and some dosimeters. Some studies were also performed with one or two instances of heterogeneity in the head phantom to measure the dose delivered to the target. But these studies assumed the head as a sphere and simple shape heterogeneity...
August 2, 2017: Medical Physics
https://www.readbyqxmd.com/read/28765060/contemporary-management-and-surveillance-strategy-after-shunt-or-endoscopic-third-ventriculostomy-procedures-for-hydrocephalus
#13
REVIEW
M Burhan Janjua, Caitlin E Hoffman, Mark M Souweidane
The management of hydrocephalus can be challenging even in expert hands. Due to acute presentation, recurrence, accompanying complications, the need for urgent diagnosis; a robust management plan is an absolute necessity. We devised a novel time efficient surveillance strategy during emergency, and clinic follow up settings which has never been described in the literature. We searched all articles embracing management/surveillance protocol on pediatric hydrocephalus utilizing the terms "hydrocephalus follow up" or "surveillance protocol after hydrocephalus treatment"...
July 29, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28764643/detection-of-articular-perforations-of-the-proximal-humerus-fracture-using-a-mobile-3d-image-intensifier-a-cadaver-study
#14
Jan Theopold, Kevin Weihs, Christine Feja, Bastian Marquaß, Christoph Josten, Pierre Hepp
BACKGROUND: The purpose of this study was to investigate the accuracy of perforation detection with multiplanar reconstructions using a mobile 3D image intensifier. METHODS: In 12 paired human humeri, K-wires perforating the subchondral bone and placed just below the cartilage level were directed toward five specific regions in the humeral head. Image acquisition was initiated by a fluoroscopy scan. Within a range of 90°, 45° external rotation (ER) and 45° internal rotation (IR)...
August 1, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28759983/validation-of-ct-image-based-software-for-three-dimensional-measurement-of-acetabular-coverage-profile
#15
Marcus P Wenzl, Markus Heller, Viktor Janz, Carsten Perka, Georgi I Wassilew
BACKGROUND: Plain radiography, 2-dimensional (2D) magnetic resonance imaging (MRI), and computed tomography (CT) do not precisely display morphology and acetabular coverage in developmental dysplasia of the hip or pincer-type femoroacetabular impingement. Pelvic position and pelvic tilt affect assessment of the acetabular parameters, leading to misinterpretation. OBJECTIVE: We tested a 3-dimensional (3D) CT evaluation script to calculate the crossover sign (COS), acetabular coverage and morphology...
July 21, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28741720/alteplase-for-acute-ischemic-stroke-after-heparin-reversal-with-protamine-a-case-report-and-review
#16
Gabriel V Fontaine, Shawn M Smith
BACKGROUND: Few patients presenting with acute ischemic stroke (AIS) are eligible for alteplase, especially those receiving ongoing anticoagulation. We describe the first reported case of a patient receiving full-dose intravenous (IV) alteplase for AIS after heparin reversal with protamine. CASE: A 73-year-old male presented with AIS. He was treated with IV heparin, tirofiban, loading-dose prasugrel, and aspirin prior to percutaneous coronary intervention (PCI) for placement of a right coronary artery stent...
July 25, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28739290/implementation-of-the-canadian-ct-head-rule-and-its-association-with-use-of-computed-tomography-among-patients-with-head-injury
#17
Adam L Sharp, Brian Z Huang, Tania Tang, Ernest Shen, Edward R Melnick, Arjun K Venkatesh, Michael H Kanter, Michael K Gould
STUDY OBJECTIVE: Approximately 1 in 3 computed tomography (CT) scans performed for head injury may be avoidable. We evaluate the association of implementation of the Canadian CT Head Rule on head CT imaging in community emergency departments (EDs). METHODS: We conducted an interrupted time-series analysis of encounters from January 2014 to December 2015 in 13 Southern California EDs. Adult health plan members with a trauma diagnosis and Glasgow Coma Scale score at ED triage were included...
July 21, 2017: Annals of Emergency Medicine
https://www.readbyqxmd.com/read/28738009/morphological-evaluation-of-clefts-of-the-lip-palate-or-both-in-dogs
#18
Santiago Peralta, Nadine Fiani, Kimi H Kan-Rohrer, Frank J M Verstraete
OBJECTIVE To systematically characterize the morphology of cleft lip, cleft palate, and cleft lip and palate in dogs. ANIMALS 32 client-owned dogs with clefts of the lip (n = 5), palate (23), or both (4) that had undergone a CT or cone-beam CT scan of the head prior to any surgical procedures involving the oral cavity or face. PROCEDURES Dog signalment and skull type were recorded. The anatomic form of each defect was characterized by use of a widely used human oral-cleft classification system on the basis of CT findings and clinical images...
August 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28730268/detection-of-vessel-wall-calcifications-in-vertebral-arteries-using-susceptibility-weighted-imaging
#19
Lisa C Adams, Sarah M Böker, Yvonne Y Bender, Eva M Fallenberg, Moritz Wagner, Thomas Liebig, Bernd Hamm, Marcus R Makowski
PURPOSE: Calcification of the brain supplying arteries has been linked to an increased risk for cerebrovascular disease. The purpose of this study was to test the potential of susceptibility weighted MR imaging (SWMR) for the detection of vertebral artery calcifications, based on CT as a reference standard. METHODS: Four hundred seventy-four patients, who had received head CT and 1.5 T MR scans with SWMR, including the distal vertebral artery, between January 2014 and December 2016, were retrospectively evaluated and 389 patients were included...
July 20, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28721605/how-to-provide-gadolinium-free-pet-mr-cancer-staging-of-children-and-young-adults-in-less-than-1%C3%A2-h-the-stanford-approach
#20
Anne M Muehe, Ashok J Theruvath, Lillian Lai, Maryam Aghighi, Andrew Quon, Samantha J Holdsworth, Jia Wang, Sandra Luna-Fineman, Neyssa Marina, Ranjana Advani, Jarrett Rosenberg, Heike E Daldrup-Link
PURPOSE: To provide clinically useful gadolinium-free whole-body cancer staging of children and young adults with integrated positron emission tomography/magnetic resonance (PET/MR) imaging in less than 1 h. PROCEDURES: In this prospective clinical trial, 20 children and young adults (11-30 years old, 6 male, 14 female) with solid tumors underwent 2-deoxy-2-[(18)F]fluoro-D-glucose ([(18)F]FDG) PET/MR on a 3T PET/MR scanner after intravenous injection of ferumoxytol (5 mg Fe/kg) and [(18)F]FDG (2-3 MBq/kg)...
July 18, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
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