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Repeat head CT scan

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https://www.readbyqxmd.com/read/28331537/combined-totally-mini-invasive-approach-in-necrotizing-pancreatitis-a-case-report-and-systematic-literature-review
#1
REVIEW
Luca Sorrentino, Osvaldo Chiara, Massimiliano Mutignani, Fabrizio Sammartano, Paolo Brioschi, Stefania Cimbanassi
BACKGROUND: Currently, both the step-up approach, combining percutaneous drainage (PD) and video-assisted retroperitoneal debridement (VARD), and endoscopic transgastric necrosectomy (ETN) are mini-invasive techniques for infected necrosis in severe acute pancreatitis. A combination of these approaches could maximize the management of necrotizing pancreatitis, conjugating the benefits from both the experiences. However, reporting of this combined strategy is anecdotal. This is the first reported case of severe necrotizing pancreatitis complicated by biliary fistula treated by a combination of ETN, PD, VARD, and endoscopic biliary stenting...
2017: World Journal of Emergency Surgery: WJES
https://www.readbyqxmd.com/read/28286280/over-drainage-secondary-to-ventriculosinus-shunt-a-case-report
#2
Tianyuan Zhao, Wei Ouyang, Shaobing Wang, Peitao Wu
BACKGROUND: Shunting to the cranial venous sinus represents a novel treatment strategy for hydrocephalus. To our knowledge, overdrainage as a complication following shunting to the cranial venous sinus has not previously been reported in the clinical literature. Here we report the case of a 50-year-old man who suffered from overdrainage after a ventriculosinus shunt insertion. CASE DESCRIPTION: A 50-year-old man was admitted to our hospital with recurring fever and gait difficulty 4 months after a ventriculoperitoneal shunt (VPS) insertion for primary communicating hydrocephalus...
March 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28248802/repeat-head-imaging-in-blunt-pediatric-trauma-patients-is-it-necessary
#3
E Patricia Hill, P J Stiles, Jared Reyes, R Joseph Nold, Stephen D Helmer, James M Haan
BACKGROUND: Children with confirmed brain injury usually undergo follow-up computed tomography scan (CT) of the head within 24 hours of admission. To date, no evidence exists to validate the diagnostic or therapeutic value of these repeat CTs. The purpose of this study was to: (1) evaluate progression of traumatic brain injuries, (2) determine if routine repeat imaging changes management, and (3) compare the efficacy of recognizing worsening hemorrhage with serial neurologic examination versus repeat imaging...
February 28, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28180123/repetitive-traumatic-brain-injury-in-patients-from-kashan-iran
#4
Esmaeil Fakharian, Mahdi Mohammadzadeh, Shirin Behdadmehr, Hamid Reza Sabri, Azadeh Sadat Mirzadeh, Javad Mohammadzadeh
BACKGROUND: Traumatic brain injury (TBI) is a worldwide problem, especially in countries with high incidence of road traffic accidents such as Iran. Patients with a single occurrence of TBI have been shown to be at increased risk to sustain future TBI. OBJECTIVES: The aim of this study was to present the incidence and characteristics of repeated TBI (RTBI) in Iranian patients. PATIENTS AND METHODS: During one year, all admitted TBI patients with prior TBI history were enrolled into the study...
September 2016: Trauma Monthly
https://www.readbyqxmd.com/read/28074785/deformable-registration-of-ct-and-cone-beam-ct-with-local-intensity-matching
#5
Seyoun Park, William Plishker, Harry Quon, John Wong, Raj Shekhar, Junghoon Lee
Cone-beam CT (CBCT) is a widely used intra-operative imaging modality in image-guided radiotherapy and surgery. A short scan followed by a filtered-backprojection is typically used for CBCT reconstruction. While data on the mid-plane (plane of source-detector rotation) is complete, off-mid-planes undergo different information deficiency and the computed reconstructions are approximate. This causes different reconstruction artifacts at off-mid-planes depending on slice locations, and therefore impedes accurate registration between CT and CBCT...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28048096/su-f-j-205-effect-of-cone-beam-factor-on-cone-beam-ct-number-accuracy
#6
W Yao, C Hua, J Farr, S Brady, T Merchant
PURPOSE: To examine the suitability of a Catphan™ 700 phantom for image quality QA of a cone beam computed tomography (CBCT) system deployed for proton therapy. METHODS: Catphan phantoms, particularly Catphan™ 504, are commonly used in image quality QA for CBCT. As a newer product, Catphan™ 700 offers more tissue equivalent inserts which may be useful for generating the electron density - CT number curve for CBCT based treatment planning. The sensitometry-and-geometry module used in Catphan™ 700 is located at the end of the phantom and after the resolution line pair module...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047877/su-c-206-05-pixel-wise-calculation-of-noise-statistics-on-iterative-ct-reconstruction-from-a-single-scan
#7
T Wang, L Zhu
PURPOSE: As iterative CT reconstruction continues to advance, the spatial distributions of noise standard deviation (STD) and accurate noise power spectrum (NPS) on reconstructed CT images become more important for method evaluation ans algorithm parameters settings. Using data of a single scan, we propose a practical method for pixel-wise noise statistics calculation on iterative CT reconstruction image, which enables accurate calculation of noise STD for each pixel and NPS without stationary noise assumption...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047159/th-cd-207a-10-using-the-gamma-index-to-flag-changes-in-anatomy-during-radiation-therapy-of-head-and-neck-cancer
#8
B Schaly, J Kempe, S Mitchell, V Venkatesan, J Battista
PURPOSE: This article presents a fast algorithm for comparing 3-D anatomy from Cone-Beam CT (CBCT) imaging using the gamma comparison index and to demonstrate how this can be used to flag patients for possible re-planning of treatment. METHODS: CBCT scans acquired on a Varian linear accelerator during treatment were used as input to the gamma comparator using thresholds of 5 mm distance to agreement and 30 Hounsfield Unit CT number difference. The fraction 1 CBCT study was initially used as the reference...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27837185/quantitative-estimation-of-a-ratio-of-intracranial-cerebrospinal-fluid-volume-to-brain-volume-based-on-segmentation-of-ct-images-in-patients-with-extra-axial-hematoma
#9
Ha Son Nguyen, Mohit Patel, Luyuan Li, Shekar Kurpad, Wade Mueller
Background Diminishing volume of intracranial cerebrospinal fluid (CSF) in patients with space-occupying masses have been attributed to unfavorable outcome associated with reduction of cerebral perfusion pressure and subsequent brain ischemia. Objective The objective of this article is to employ a ratio of CSF volume to brain volume for longitudinal assessment of space-volume relationships in patients with extra-axial hematoma and to determine variability of the ratio among patients with different types and stages of hematoma...
February 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/27833352/adaptive-radiotherapy-for-head-neck-cancer
#10
Shrikant Balasaheb Mali
Changes in patient anatomy may occur either from a tumour volume, position or function of a specific organ at risk, or target volume, weight loss or a reduction in postoperative oedema, and may vary between patients. Adaptive radiotherapy aims to correct morphological variations by realizing one or more plans during the treatment course. Imaging is used to detect these variations, thereby deciding on a potential replanning. At present, adaptive radiotherapy for head neck cancer (HNC) mainly deals with treatment response, such as weight loss or tumor shrinkage...
December 2016: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/27782729/an-iterative-projection-based-motion-estimation-and-compensation-scheme-for-head-x-ray-ct
#11
Tao Sun, Jung-Ha Kim, Roger Fulton, Johan Nuyts
PURPOSE: Although current computed tomography (CT) systems can scan the head in a very short time, patient motion sometimes still induces artifacts. If motion occurs, one has to repeat the scan; to avoid motion, sedation or anesthesia is sometimes applied. METHODS: The authors propose a method to iteratively estimate and compensate this motion during the reconstruction. In every iteration, the rigid motion was estimated view-by-view and then used to update the system matrix...
October 2016: Medical Physics
https://www.readbyqxmd.com/read/27718440/an-interesting-case-report-of-vertebral-artery-dissection-following-polytrauma
#12
Vikas Acharya, Suresh Chandrasekaran, Sujit Nair
INTRODUCTION: The authors present an interesting case of a 19-year-old male who presented as a polytrauma patient following a fall from a height. PRESENTATION OF CASE: He was initially managed on the intensive care unit with intracranial pressure bolt monitoring after being intubated and sedated and having his other traumatic injuries stabilized. Upon attempting to wean sedation and extubation a repeat CT scan of the head was undertaken and showed a new area suggested of cerebral infarction, this was a new finding...
October 3, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27663515/immune-biomarkers-of-treatment-failure-for-a-patient-on-a-phase-i-clinical-trial-of-pembrolizumab-plus-radiotherapy
#13
Gregory S Alexander, Joshua D Palmer, Madalina Tuluc, Jianqing Lin, Adam P Dicker, Voichita Bar-Ad, Larry A Harshyne, Jennifer Louie, Colette M Shaw, D Craig Hooper, Bo Lu
BACKGROUND: Pembrolizumab is a monoclonal antibody that is designed against programmed cell death protein 1 (PD-1). Pembrolizumab and other immunocheckpoint-blocking monoclonal antibodies work by modulating a patient's own immune system to increase anti-tumor activity. While immunocheckpoint blockade has shown promising results, only 20-40 % of patients experience objective clinical benefit. Differences in individual tumor biology and the presence multiple immune checkpoints present a challenge for treatment...
September 23, 2016: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/27624450/diagnosis-and-treatment-of-a-rare-sinonasal-neuroendocrine-tumour-adding-to-the-evidence
#14
Aashrai Gudlavalleti, Ryan Dean, Yuxin Liu, Amit S Dhamoon
Sinonasal neuroendocrine tumours (NETs) are rare, aggressive neoplasms with a high recurrence potential. There are no robust protocols for the management of these tumours. An 81-year-old man presented with an incidental sinonasal mass visualised on CT scan of head. Over the next few weeks he developed new onset, progressively worsening headache, right eye ptosis and restricted extraocular movements. Imaging confirmed a rapidly enlarging tumour involving the right nasal cavity and the orbit. Biopsy showed a large cell neuroendocrine carcinoma of the right ethmoidal sinus...
September 13, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27618379/utility-of-repeat-head-computed-tomography-for-intracranial-hemorrhage-after-trauma-and-importance-of-direct-patient-care
#15
Mary Ellen Zimmermann, Zachary Brown, Praise Matemavi, Gloria Melnic, Jason Sample
At many institutions, it is common practice for trauma patients with traumatic intracranial hemorrhage (ICH) to receive routine repeat head computed tomographic (CT) scans after the initial CT scan, regardless of symptoms, to evaluate progression of the injury. The purpose of this study was to assess quantifiable risk factors (age, anticoagulation, gender) that could place patients at greater risk for progression of injury, thus requiring surgical intervention (craniotomy, craniectomy) for which serial CT scanning would be useful...
September 2016: Journal of Trauma Nursing: the Official Journal of the Society of Trauma Nurses
https://www.readbyqxmd.com/read/27600874/agreement-and-precision-of-periprosthetic-bone-density-measurements-in-micro-ct-single-and-dual-energy-ct
#16
Bo Mussmann, Søren Overgaard, Trine Torfing, Peter Traise, Oke Gerke, Poul Erik Andersen
The objective of this study was to test the precision and agreement between bone mineral density measurements performed in micro CT, single and dual energy computed tomography, to determine how the keV level influences density measurements and to assess the usefulness of quantitative dual energy computed tomography as a research tool for longitudinal studies aiming to measure bone loss adjacent to total hip replacements. Samples from 10 fresh-frozen porcine femoral heads were placed in a Perspex phantom and computed tomography was performed with two acquisition modes...
September 7, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27577592/the-clinical-impact-of-a-web-based-image%C3%A2-repository-on-radiation-exposure-in%C3%A2-injured-children
#17
Rosemary Nabaweesi, Raghu H Ramakrishnaiah, Mallikarjuna R Rettiganti, Chunqiao Luo, Charles M Glasier, Robert T Maxson, Mary E Aitken, Philip J Kenney, James M Robbins
PURPOSE: The long-term cancer risks for children exposed to radiologic images can be two to three times higher than for adults because children are more sensitive to radiation and have a longer lifetime in which to accumulate exposure from CT scans. Injured children often undergo repeat CT imaging if they are transferred from non-pediatric hospitals to a Level I pediatric trauma center (PTC). This study determined the impact of a statewide web-based image repository (WBIR) on repeat imaging among transferred injured children...
November 2016: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/27561990/dynamic-change-of-neutrophil-to-lymphocyte-ratio-and-hemorrhagic-transformation-after-thrombolysis-in-stroke
#18
Zhiliang Guo, Shuhong Yu, Lulu Xiao, Xin Chen, Ruidong Ye, Ping Zheng, Qiliang Dai, Wen Sun, Changsheng Zhou, Shuiping Wang, Wusheng Zhu, Xinfeng Liu
BACKGROUND: The neutrophil to lymphocyte ratio (NLR) has been shown to predict short- and long-term outcomes in ischemic stroke patients. We sought to explore the temporal profile of the plasma NLR in stroke patients treated with intravenous thrombolysis (IVT) and its relationship with intracranial bleeding complications after thrombolysis. METHODS: A total of 189 ischemic stroke patients were prospectively enrolled. Blood samples for leukocyte, neutrophil, and lymphocyte counts were obtained at admission and at 3-6, 12-18, and 36-48 h after IVT...
2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27473443/risk-of-delayed-intracranial-hemorrhage-in-anticoagulated-patients-with-mild-traumatic-brain-injury-systematic-review-and%C3%A2-meta-analysis
#19
Jean-Marc Chauny, Martin Marquis, Francis Bernard, David Williamson, Martin Albert, Mathieu Laroche, Raoul Daoust
BACKGROUND: Delayed intracranial hemorrhage is a potential complication of head trauma in anticoagulated patients. OBJECTIVE: Our aim was to use a systematic review and meta-analysis to determine the risk of delayed intracranial hemorrhage 24 h after head trauma in patients who have a normal initial brain computed tomography (CT) scan but took vitamin K antagonist before injury. METHODS: EMBASE, Medline, and Cochrane Library were searched using controlled vocabulary and keywords...
November 2016: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27444293/evaluation-of-the-necessity-of-hospitalization-in-children-with-an-isolated-linear-skull-fracture-isf
#20
Adi Reuveni-Salzman, Guy Rosenthal, Oded Poznanski, Yigal Shoshan, Mony Benifla
OBJECTIVE: The prevalence of skull fractures after mild head trauma is 2 % in children of all ages and 11 % in children younger than 2 years. The current standard management for a child diagnosed with an isolated skull fracture (ISF), in our institute, is hospitalization for a 24-h observation period. Based on data from the literature, less than 1 % of all minor head injuries require neurosurgical intervention. The main objective of this study was to evaluate the risk of neurological deterioration of ISF cases, in order to assess the need for hospitalization...
September 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
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