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Thyroid imaging

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https://www.readbyqxmd.com/read/28817195/vertical-off-centering-affects-organ-dose-in-chest-ct-evidence-from-monte-carlo-simulations-in-anthropomorphic-phantoms
#1
Natalia Saltybaeva, Hatem Alkadhi
PURPOSE: The objective of our study was to assess the effect of patient vertical off-centering on organ dose in chest CT with tube current modulation. METHODS: For this purpose, anthropomorphic phantoms representing adult male, female and overweight male were scanned on 192-slice CT scanner at eleven different vertical positions (maximal off-centering ± 5 cm). Monte Carlo simulations were performed for each of the investigated setup, using tube current values extracted from the raw data, in order to obtain 3D dose distributions...
August 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28816914/congenital-hypotonia-in-toddlerhood
#2
Naomi Steiner, Alcy Torres, Arathi Reddy, Marilyn Augustyn
David is a 22-month-old boy who is new to your practice. He recently moved from a rural area in the Midwest. His father is in the United States Air Force, and his mother works as a full-time homemaker. Their household includes 5 older siblings. The family moves every year because of the father's Air Force placement.David was born full-term in Virginia, with no reported pregnancy complications and no alcohol, tobacco, or drug exposure. He was delivered vaginally, with Apgar scores of 7 and 9, respectively and no respiratory issues...
August 9, 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28811719/refractory-hepatic-encephalopathy-in-a-patient-with-hypothyroidism-another-element-in-ammonia-metabolism
#3
Fernando Díaz-Fontenla, Marta Castillo-Pradillo, Arantxa Díaz-Gómez, Luis Ibañez-Samaniego, Pilar Gancedo, Juan Adan Guzmán-de-Villoria, Pilar Fernández-García, Rafael Bañares-Cañizares, Rita García-Martínez
Hepatic encephalopathy (HE) remains a diagnosis of exclusion due to the lack of specific signs and symptoms. Refractory HE is an uncommon but serious condition that requires the search of hidden precipitating events (i.e., portosystemic shunt) and alternative diagnosis. Hypothyroidism shares clinical manifestations with HE and is usually considered within the differential diagnosis of HE. Here, we describe a patient with refractory HE who presented a large portosystemic shunt and post-ablative hypothyroidism...
July 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28807924/thyroid-cancer-incidence-in-canada-a-national-cancer-registry-analysis
#4
Dawnelle Topstad, James A Dickinson
BACKGROUND: Thyroid cancer incidence rates are increasing in many developed countries while mortality rates remain stable. International evidence shows that the increase in incidence rates is mostly caused by overdiagnosis of small papillary cancers. We sought to describe how thyroid cancer incidence has changed and how it varies between provinces in Canada. METHODS: Data were obtained from the National Cancer Incidence Reporting System, causes of death tables and the Canadian Cancer Registry using the 1991 census population structure...
August 11, 2017: CMAJ Open
https://www.readbyqxmd.com/read/28806247/glomus-tumor-of-the-neck-detected-with-99mtc-edda-hynic-toc
#5
Neva Girotto, Tatjana Bogović-Crnčić, Svjetlana Grbac-Ivanković, Petra Valković-Zujić
A 54-year-old woman was referred to thyroid evaluation because of a lump on the left side of the neck. Ultrasound exam did not show any thyroid abnormality, but highly perfused nodule at the left common carotid artery bifurcation was found. Because of the specific location, somatostatin receptor scintigraphy with Tc EDDA HYNIC-TOC was performed, starting with perfusion images and followed with SPECT/CT imaging at 2 and 4 hours. Well-perfused nodule with intensive accumulation and no other visible pathology in the body raised suspicion of a glomus tumor, consistent with MR exam performed later...
August 12, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28804730/breast-dose-reduction-with-organ-based-wide-angle-tube-current-modulated-ct
#6
Wanyi Fu, Gregory M Sturgeon, Greeshma Agasthya, William Paul Segars, Anuj J Kapadia, Ehsan Samei
This study aimed to estimate the organ dose reduction potential for organ-dose-based tube current modulated (ODM) thoracic computed tomography (CT) with a wide dose reduction arc. Twenty-one computational anthropomorphic phantoms (XCAT) were used to create a virtual patient population with clinical anatomic variations. The phantoms were created based on patient images with normal anatomy (age range: 27 to 66 years, weight range: 52.0 to 105.8 kg). For each phantom, two breast tissue compositions were simulated: [Formula: see text] and [Formula: see text] (glandular-to-adipose ratio)...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28804657/a-recurrent-episode-of-dermatomyositis-associated-with-papillary-thyroid-cancer
#7
Vijay Gopal Eranki
OBJECTIVE: It is uncommon for dermatomyositis to be associated with papillary thyroid cancer. We report an unusual case of papillary thyroid cancer presenting with dermatomyositis. METHODS: The case history, imaging and laboratory data is reviewed. RESULTS: We report the case of a 62-year-old female with a prior history of dermatomyositis and breast cancer who presented with a recurrent episode of dermatomyositis. Extensive evaluation of the cause of the dermatomyositis recurrence revealed no recurrence of the breast cancer but a thyroid nodule was identified...
2017: Case Reports in Endocrinology
https://www.readbyqxmd.com/read/28790781/to-study-the-efficacy-of-thallium-201-as-tumor-seeking-agent-and-to-study-its-role-in-therapeutic-response
#8
A V S Anil Kumar, P G Kumar, Sangeetha Sampath, V Suhag
BACKGROUND: Tumour seeking characteristics of TL-201 have been underutilized. The study was undertaken to evaluate the role of TL-201 scintigraphy in tumour imaging. METHODS: A total of 50 cases were studied over a period of 18 months (13 lymphomas, 11 breast carcinoma, 10 lung cancer, 6 of soft tissue sarcoma, 2 bone tumours and 4 cases each of thyroid and brain tumours). Thallium-201 chloride was injected IV in the dose range of 3-5 mCi. Imaging was done using Siemen's ECAM dual headed gamma camera...
July 2017: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/28789933/radiation-protection-in-dental-radiology-recent-advances-and-future-directions
#9
V Tsapaki
Dental radiology uses X-ray technology to diagnose and design treatment of various clinical problems related to the oral cavity and surrounding tissues. As technology quickly evolves, there are numerous X-ray modalities using different tools in the attempt to best image and treat efficiently these diseases, disorders or other related clinical conditions. The reported numbers of dental X-rays, the fact that these may be under-reported in many countries and because dental X-rays are performed more on younger individuals, whose teeth and dentition are still developing, calls for increased need on radiation protection...
August 5, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28781832/acute-suppurative-thyroiditis-caused-by-streptococcus-agalactiae-infection-a-case-report
#10
Nobuhiro Akuzawa, Toru Yokota, Tsukasa Suzuki, Masahiko Kurabayashi
Acute suppurative thyroiditis is a serious disease; therefore, its diagnosis in the acute phase is important. Fine needle aspiration biopsy of the thyroid gland plays a pivotal role in the diagnosis of acute suppurative thyroiditis. Appropriate culture technique and optimal imaging modalities are also important for its diagnosis.
August 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28777428/a-unique-case-of-malignant-mixed-m%C3%A3-llerian-tumor-with-metastasis-to-the-thyroid-a-case-report
#11
Octavio Chavez Herbas, Beatriz E Garcia-Prieto, Ilmana Fulger
We present a case of a 61-year-old postmenopausal woman with a known diagnosis of malignant mixed müllerian tumor (MMMT) originally treated with systemic chemotherapy and total abdominal hysterectomy plus bilateral salpingo-oophorectomy, who developed a left cervical mass noted on a follow-up visit. Imaging and nuclear testing were both performed confirming the presence of a cervical mass arising from the thyroid. Our patient underwent surgical resection of the mass, and biopsy of the specimen was consistent with metastatic uterine carcinosarcoma mixed müllerian tumor...
July 26, 2017: Tumori
https://www.readbyqxmd.com/read/28770897/typical-graves-ophthalmopathy-in-primary-hypothyroidism
#12
Zareen Kiran, Owais Rashid, Najmul Islam
Graves ophthalmopathy (GO) usually occurs in a close temporal relationship with hyperthyroidism. It is rare in patients with normal thyroid function (euthyroid GO) and in patients with hypothyroid forms of thyroid autoimmune diseases (hypothyroid GO). We report a 52-years old man presenting in our endocrine clinic with diagnosed primary hypothyroidism 3 months back during evaluation for glaucoma. He was later referred by an ophthalmologist to exclude Grave's eye disease, where he had presented with chief complaints of bilateral prominent eyes...
July 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28765379/correction-noninvasive-in-vivo-imaging-and-biologic-characterization-of-thyroid-tumors-by-immunopet-targeting-of-galectin-3
#13
(no author information available yet)
No abstract text is available yet for this article.
August 1, 2017: Cancer Research
https://www.readbyqxmd.com/read/28762196/ultrasound-image-based-thyroid-nodule-automatic-segmentation-using-convolutional-neural-networks
#14
Jinlian Ma, Fa Wu, Tian'an Jiang, Qiyu Zhao, Dexing Kong
PURPOSE: Delineation of thyroid nodule boundaries from ultrasound images plays an important role in calculation of clinical indices and diagnosis of thyroid diseases. However, it is challenging for accurate and automatic segmentation of thyroid nodules because of their heterogeneous appearance and components similar to the background. In this study, we employ a deep convolutional neural network (CNN) to automatically segment thyroid nodules from ultrasound images. METHODS: Our CNN-based method formulates a thyroid nodule segmentation problem as a patch classification task, where the relationship among patches is ignored...
July 31, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28761733/prevalence-of-hypothyroidism-among-patients-with-breast-cancer-treated-with-radiation-to-the-supraclavicular-field-a-single-centre-survey
#15
Yuichiro Kikawa, Yasuhiro Kosaka, Kazuki Hashimoto, Eri Hohokabe, Sayaka Takebe, Ryo Narukami, Takayuki Hattori, Kazuhiro Ueki, Kengo Ogura, Toshiyuki Imagumbai, Hironori Kato, Masaki Kokubo
PURPOSE: We investigated the prevalence of hypothyroidism (HT) in patients with breast cancer who received radiation therapy to the supraclavicular (SC) field to evaluate the effect of radiation on thyroid. METHODS: Between April 2007 and May 2016, consecutive patients with invasive breast cancer who received SC radiation were recruited. Thyroid-stimulating hormone (TSH) and free thyroxine (fT4) were measured between April and August 2016. On the basis of the radiation-planning CT images, thyroid volume was calculated and dose-volume parameters were estimated...
2017: ESMO Open
https://www.readbyqxmd.com/read/28761147/cytologically-indeterminate-thyroid-nodules-increased-diagnostic-performance-with-combination-of-us-ti-rads-and-a-new-scoring-system
#16
Ya-Ping He, Hui-Xiong Xu, Chong-Ke Zhao, Li-Ping Sun, Xiao-Long Li, Wen-Wen Yue, Le-Hang Guo, Dan Wang, Wei-Wei Ren, Qiao Wang, Shen Qu
To investigate the diagnostic performance of combination of ultrasound (US) thyroid imaging reporting and data system (TI-RADS) and a new US scoring system for diagnosing thyroid nodules (TNs) with indeterminate results (Bethesda categories III, IV and V) on fine-needle aspiration (FNA) cytology. 453 patients with 453 cytologically indeterminate TNs were included in this study. Multivariate analyses were performed to construct the scoring system. The diagnostic performances of TI-RADS and the combined method were evaluated and compared...
July 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28760238/selected-controversies-of-radioiodine-imaging-and-therapy-in-differentiated-thyroid-cancer
#17
REVIEW
Douglas Van Nostrand
This article discusses the more controversial areas of the management of differentiated thyroid cancer, namely, the utility of pretherapy staging radioiodine scans; the prescribed activity for iodine-131 remnant ablation, adjuvant treatment, and distant metastases; preparation with thyroid hormone withdrawal versus recombinant human thyroid-stimulating hormone; and the classification of radioiodine refractory differentiated thyroid cancer. The author reviews various aspects of the controversies, such as the recommendations of the 2015 guidelines of the American Thyroid Association, arguments for and against the various controversies, and selected references...
September 2017: Endocrinology and Metabolism Clinics of North America
https://www.readbyqxmd.com/read/28760234/thyroid-cancer-ultrasound-imaging-and-fine-needle-aspiration-biopsy
#18
REVIEW
Michelle Melany, Sardius Chen
Ultrasound is critical in detection, diagnosis, and management of thyroid nodules. Ultrasound detection of regional nodal metastatic disease is based on abnormal nodal morphology rather than size and is critical to initial surgical and long-term management of thyroid cancer. Fine-needle aspiration biopsy is the gold standard for malignancy diagnosis in thyroid cancer. Thyroglobulin assay of nodal aspirates improves accuracy in diagnosis of metastases. Reporting lexicons assign risk levels to thyroid nodules with the goal of improving and standardizing patient management...
September 2017: Endocrinology and Metabolism Clinics of North America
https://www.readbyqxmd.com/read/28757830/a-feasibility-study-to-assess-vallecula-and-pyriform-sinus-using-protocol-based-ultrasonic-evaluation-of-floor-of-mouth-and-upper-airway
#19
Kulvinder Singh, Saru Singh, Ruchi Gupta, Chiranjeev Gathwal, Pranav Bansal, Manjeet Singh
PURPOSE: The current study aimed to systematically evaluate the sonoanatomy of floor of the mouth and upper airway using protocol-based ultrasonography (USG); and to assess the feasibility of imaging the valleculae and pyriform fossae. MATERIALS AND METHODS: An institutional prospective observational study was planned on fifty volunteers of all ages and both sexes, attending outpatient department for nonairway-related diseases. Protocol for ultrasonographic systemic evaluation was designed before starting the trial...
July 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28751368/functional-correlates-of-detailed-body-composition-in-healthy-elderly-subjects
#20
Corinna Geisler, Lisa Schweitzer, Manfred James Müller
Methods of body composition analysis (BCA) are now widely used to characterize health status, i.e. nutritional status, metabolic rates and cardio-metabolic risk factors. However, the functional correlates of individual body components have not been systematically analyzed. A 2-compartment model was assessed by air displacement plethysmographie, detailed body composition (BC)was measured by whole-body magnetic resonance imaging (MRI) in a healthy population of 40 Caucasians aged 65 to 81 years (20 males; body mass index range: 18...
July 27, 2017: Journal of Applied Physiology
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