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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
#1
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
https://www.readbyqxmd.com/read/28713667/absent-congenital-cervical-pedicle-nearly-misdiagnosed-as-a-facet-dislocation-a-case-report
#2
Scott Safir, Jonathan Rasouli, Jeremy Steinberger, Branko Skovrlj, Amish Doshi, Konstantinos Margetis, Saadi Ghatan
BACKGROUND: Cervical spinal injury encompasses up to 1.5% of all pediatric injuries. Children, and more specifically infants, are a difficult subset of patients to obtain neurological exam in the setting of trauma, thus necessitating the use of cervical X-rays, CT scans, and MRI imaging. CASE DESCRIPTION: A healthy, 15-month-old boy had an unwitnessed fall down a flight of stairs and received a CT scan of the head and cervical spine in the emergency department due to cephalohematoma and mechanism of injury...
September 2017: Interdisciplinary Neurosurgery: Advanced Techniques and Case Management
https://www.readbyqxmd.com/read/28711205/dual-energy-computed-tomography-applications-for-the-evaluation-of-cervical-lymphadenopathy
#3
REVIEW
Ahmed M Tawfik, Andreas Michael Bucher, Thomas J Vogl
There is recent interest in the use of dual-energy computed tomography (CT) in head and neck imaging, and the results are encouraging. This article reviews dual-energy CT applications as complementary tools to conventional CT scanning in the evaluation of cervical lymphadenopathy. The article cites the most relevant studies and highlights their results. Single-source and dual-source dual-energy applications including virtual noncontrast images, linear and nonlinear image blending, monochromatic images, iodine quantification, and spectral Hounsfield unit attenuation curve analysis are reviewed...
August 2017: Neuroimaging Clinics of North America
https://www.readbyqxmd.com/read/28711199/dual-energy-computed-tomography-physical-principles-approaches-to-scanning-usage-and-implementation-part-1
#4
REVIEW
Reza Forghani, Bruno De Man, Rajiv Gupta
There are increasing applications of dual-energy computed tomography (CT), a type of spectral CT, in neuroradiology and head and neck imaging. In this 2-part review, the fundamental principles underlying spectral CT scanning and the major considerations in implementing this type of scanning in clinical practice are reviewed. In the first part of this 2-part review, the physical principles underlying spectral CT scanning are reviewed, followed by an overview of the different approaches for spectral CT scanning, including a discussion of the strengths and challenges encountered with each approach...
August 2017: Neuroimaging Clinics of North America
https://www.readbyqxmd.com/read/28698880/secure-screw-placement-in-management-of-acetabular-fractures-using-the-suprapectineal-quadrilateral-buttress-plate
#5
R J Egli, M J B Keel, J L Cullmann, J D Bastian
Acetabular fractures involving predominantly the anterior column associated with a disruption of the quadrilateral surface can be treated with instrumentation implementing the stabilization of the quadrilateral surface. The recently introduced suprapectineal quadrilateral buttress plate is specifically designed to prevent secondary medial subluxation of the femoral head, especially in elderly patients with reduced ability for partial weight bearing. Whereas there are guidelines available for safe screw fixation for the anterior and posterior columns, there might be a concern for intra-articular placement of screws placed through the infrapectineal part of the quadrilateral buttress plate...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28697737/radiologic-evaluation-of-orbital-index-among-ghanaians-using-ct-scan
#6
Benard Ohene Botwe, Derick Seyram Sule, Abdul Mumin Ismael
BACKGROUND: Orbital index (OI) expresses the proportion of the orbital height to the orbital width and varies with race, regions within the same race and periods in evolution. This index is useful in forensic medicine, anthropology and surgery. However, the average OI among Ghanaian adults was unknown. AIM: The aim of this study was to determine the orbital index of adult Ghanaians and classify them under one of the three predetermined groups. METHOD: The study design was a retrospective cross-sectional...
July 11, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28693449/multiparametric-magnetic-resonance-imaging-in-mucosal-primary-head-and-neck-cancer-a-prospective-imaging-biomarker-study
#7
Christopher N Rumley, Mark T Lee, Lois Holloway, Robba Rai, Myo Min, Dion Forstner, Allan Fowler, Gary Liney
BACKGROUND: Radical radiotherapy, with or without concomitant chemotherapy forms the mainstay of organ preservation approaches in mucosal primary head and neck cancer. Despite technical advances in cancer imaging and radiotherapy administration, a significant proportion of patients fail to achieve a complete response to treatment. For those patients who do achieve a complete response, acute and late toxicities remain a cause of morbidity. A critical need therefore exists for imaging biomarkers which are capable of informing patient selection for both treatment intensification and de-escalation strategies...
July 10, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28673669/cerebral-venous-sinus-thrombosis-complicated-with-acute-development-of-dural-arteriovenous-fistula-a-case-report
#8
Ji-Gang Chen, Zhen-Xing Li, Dan-Feng Zhang, Jun-Yu Wang, Li-Jun Hou
Development of dural arteriovenous fistula (dAVF) after cerebral venous sinus thrombosis (CVST) was very uncommon and for all these reported cases, the dAVF was a chronic complication. We present a case of acute development of dAVF after CVST. A 40-year-old female was admitted into our department with 2day's headache and vomiting for 9h. Head computed tomography (CT) scan showed only scattered minor hematomas over the right frontal lobe. Blood test indicated an elevated D-dimer. The patient experienced transient paralysis (Todd's paralysis) after intermittent focal epilepsy from day 3, which progressed into sustained epilepsy on day 6...
June 30, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28670185/presentation-of-unusual-tracheal-metastasis-on-fluorine-18-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-after-9-years-in-postnephrectomy-patient-of-renal-cell-carcinoma-a-case-report-and-review-of-literature
#9
Rahul Vithalrao Parghane, Ashwani Sood, Kim Vaiphei, Ashutosh Nath Aggarwal, Bhagwant Rai Mittal
Tracheal metastases from renal cell carcinoma (RCC) are extremely rare. Most common primary malignancy metastasizing to this unusual location usually comes from lung region while it is rare to have tracheal metastases from nonpulmonary malignancies such as breast, thyroid, colorectal carcinoma, and melanoma. The lesions detected on fluorine-18 fluorodeoxyglucose (F-18 FDG) positron emission tomography/computed tomography (PET/CT) scan, especially in the head and neck region, soft tissue, and muscular compartment during follow-up of RCC patients raise the possibility of metastatic lesions in these regions, though rarely encountered...
July 2017: World Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/28658169/imaging-features-for-diffuse-type-tenosynovial-giant-cell-tumor-of-the-temporomandibular-joint-a-case-report
#10
Yan Hu, Bin Kuang, Yue Chen, Jian Shu
RATIONALE: The tenosynovial giant cell tumor (TGCT) is a benign but locally aggressive tumor that arises from the synovial membrane of joints, tendon sheaths, and bursae. Although any joint can be affected, involvement of the temporomandibular joint (TMJ) was reported very rarely, and there is no relevant report on F-FDG PET/computerized tomography (CT). PATIENT CONCERNS AND DIAGNOSES: We present here a rare case of diffuse-type of TGCT (D-TGCT) arising from the right TMJ in a 74-year-old woman...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28653013/estimation-of-signal-and-noise-for-a-whole-body-research-photon-counting-ct-system
#11
Zhoubo Li, Shuai Leng, Zhicong Yu, Steffen Kappler, Cynthia H McCollough
Photon-counting detector CT has a large number of acquisition parameters that require optimization, particularly the energy threshold configurations. Fast and accurate estimation of both signal and noise in photon-counting CT (PCCT) images can facilitate such optimization. Using the detector response function of a research PCCT system, we derived mathematical models for both signal and noise estimation, taking into account beam spectrum and filtration, object attenuation, water beam hardening, detector response, radiation dose, energy thresholds, and the propagation of noise...
April 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28651263/quality-and-dose-optimized-ct-trauma-protocol-recommendation-from-a-university-level-i-trauma-center
#12
Johannes Kahn, David Kaul, Georg Böning, Roman Rotzinger, Patrick Freyhardt, Philipp Schwabe, Martin H Maurer, Diane Miriam Renz, Florian Streitparth
Purpose As a supra-regional level-I trauma center, we evaluated computed tomography (CT) acquisitions of polytraumatized patients for quality and dose optimization purposes. Adapted statistical iterative reconstruction [(AS)IR] levels, tube voltage reduction as well as a split-bolus contrast agent (CA) protocol were applied. Materials and Methods 61 patients were split into 3 different groups that differed with respect to tube voltage (120 - 140 kVp) and level of applied ASIR reconstruction (ASIR 20 - 50 %)...
June 26, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28649478/cerebral-air-embolism-as-possible-cause-of-stroke-during-therapeutic-endobronchial-application-of-argon-plasma-coagulation
#13
Venkatkiran Kanchustambham, Manasa Reddy, Swetha Saladi, Setu Patolia
A 68-year-old male was admitted for evaluation of an endobronchial mass obstructing the right middle lobe (RML) and right lower lobe (RLL) of the lung. Flexible bronchoscopy revealed a notable endobronchial lesion in the bronchus intermedius that completely obstructed the RML and the RLL. Argon plasma coagulation (APC) at 30 watts and gas flow at 0.8 liters/minute to 1 liter/minute were applied to the tumor. In the recovery room, the patient was discovered to have a left-sided facial droop and left-sided weakness...
May 17, 2017: Curēus
https://www.readbyqxmd.com/read/28638568/dizziness-in-a-community-hospital-central-neurological-causes-clinical-predictors-and-diagnostic-yield-and-cost-of-neuroimaging-studies
#14
Hussam Ammar, Rukma Govindu, Ragai Fouda, Wael Zohdy, Emilio Supsupin
Objectives: Neuroimaging is contributing to the rising costs of dizziness evaluation. This study examined the rate of central neurological causes of dizziness, relevant clinical predictors, and the costs and diagnostic yields of neuroimaging in dizziness assessment. Methods: We retrospectively reviewed the records of 521 adult patients who visited the hospital during a 12-month period with dizziness as the chief complaint. Clinical findings were analyzed using Fisher's exact test to determine how they correlated with central neurological causes of dizziness identified by neuroimaging...
March 2017: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/28621627/factors-associated-with-shunt-dependent-hydrocephalus-after-decompressive-craniectomy-for-traumatic-brain-injury
#15
Aditya Vedantam, Jose-Miguel Yamal, Hyunsoo Hwang, Claudia S Robertson, Shankar P Gopinath
OBJECTIVE Posttraumatic hydrocephalus (PTH) affects 11.9%-36% of patients undergoing decompressive craniectomy (DC) and is an important cause of morbidity after traumatic brain injury (TBI). Early diagnosis and treatment of PTH can prevent further neurological compromise in patients who are recovering from TBI. There is limited data on predictors of shunting for PTH after DC for TBI. METHODS Prospectively collected data from the erythropoietin severe TBI randomized controlled trial were studied. Demographic, clinical, and imaging data were analyzed for enrolled patients who underwent a DC...
June 16, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28607789/unilateral-enlarged-vestibular-aqueduct-syndrome-and-bilateral-endolymphatic-hydrops
#16
Massimo Ralli, Giuseppe Nola, Luca Sparvoli, Giovanni Ralli
Enlarged vestibular aqueduct (EVA) syndrome is a common congenital inner ear malformation characterized by a vestibular aqueduct with a diameter larger than 1.5 mm, mixed or sensorineural hearing loss that ranges from mild to profound, and vestibular disorders that may be present with a range from mild imbalance to episodic objective vertigo. In our study, we present the case of a patient with unilateral enlarged vestibular aqueduct and bilateral endolymphatic hydrops (EH). EH was confirmed through anamnestic history and audiological exams; EVA was diagnosed using high-resolution CT scans and MRI images...
2017: Case Reports in Otolaryngology
https://www.readbyqxmd.com/read/28601333/variability-in-ct-imaging-of-blunt-trauma-among-ed-physicians-surgical-residents-and-trauma-surgeons
#17
Melissa K James, Shi-Wen Lee, Jennifer A Minneman, Maureen D Moore, Taylor R Klein, R Jonathan Robitsek, Phillip S Barie, Sebastian D Schubl
BACKGROUND: Trauma triage decisions can be influenced by both knowledge and experience. Consequently, there may be substantial variability in computed tomography (CT) scans desired by emergency medicine physicians, surgical chief residents, and attending trauma surgeons. We quantified this difference and studied the effects of each group's decisions on missed injuries, cost, and radiation exposure. METHODS: All blunt trauma activations at an urban level 1 trauma center were studied over a 6-mo period...
June 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28593386/prostate-specific-membrane-antigen-pet-imaging-and-immunohistochemistry-in-adenoid-cystic-carcinoma-%C3%AF-a-preliminary-analysis
#18
Thomas J W Klein Nulent, Robert J J van Es, Gerard C Krijger, Remco de Bree, Stefan M Willems, Bart de Keizer
BACKGROUND: Adenoid cystic carcinoma (AdCC) of the head and neck is an uncommon malignant epithelial tumour of the secretory glands. Many patients develop slowly growing local recurrence and/or distant metastasis, for which treatment options are limited. A retrospective analysis of 9 AdCC patients was conducted to analyse the visualization of AdCC on PSMA PET/CT and to investigate the expression of PSMA on primary, recurrent and metastatic AdCC tumour tissue using immunohistochemistry...
June 7, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28589641/the-yield-of-head-computed-tomography-in-patients-with-new-onset-of-transient-headaches
#19
Niamh Hammond, Annemarei Ranta
BACKGROUND: Headache is a common patient complaint. The threshold for brain imaging in headache is debated, especially when the headache is transient, although even if the headache has resolved at presentation a sentinel bleed heralding a subarachnoid haemorrhage (SAH) often remains a concern. AIMS: To assess the yield of computed tomography (CT) head scan referrals for patients with transient headache symptoms. METHODS: This study looked at six months of CT results assessing for brain pathology with a particular focus on subarachnoid haemorrhage...
June 7, 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/28578511/cranial-ultrasound-is-a-reliable-first-step-imaging-in-children-with-suspected-craniosynostosis
#20
L Pogliani, G V Zuccotti, M Furlanetto, V Giudici, A Erbetta, L Chiapparini, L Valentini
PURPOSE: Skull radiography (SR) and Computed Tomography (CT) are still proposed as the first-line imaging choice for the diagnosis of craniosynostosis (CS) in children with abnormal head shape, but both techniques expose infants to ionizing radiation. Several studies shown that ultrasound may play an important role in the diagnosis of craniosynostosis. The aim of our study is to assess the diagnostic accuracy of cranial ultrasound scan (CUS) and confirm if it is a reliable first step imaging evaluation for the diagnosis of craniosynostosis in newborn...
June 3, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
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