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https://www.readbyqxmd.com/read/28741786/ectopic-parathyroid-adenoma-in-the-pyriform-sinus
#1
Jonathan Kim, Maricel Cubangbang, Lacey Adkins, Stanley Chia, Timothy R DeKlotz, Lisa Boyle, Bruce Davidson
BACKGROUND: Ectopic parathyroid glands may complicate the surgical approach to primary hyperparathyroidism. We describe a rare ectopic parathyroid location, the pyriform sinus. METHODS: Three patients, 2 after prior unsuccessful parathyroid exploration, were found to have ectopic parathyroid adenomas in the pyriform sinus. Two cases were identified by 4D-CT of the neck. The other was localized by a technetium 99m sestamibi single photon emission CT (SPECT). In each case, office endoscopy confirmed the lesions...
July 25, 2017: Head & Neck
https://www.readbyqxmd.com/read/28740898/priority-driven-plan-optimization-in-locally-advanced-lung-patients-based-on-perfusion-spect-imaging
#2
Martha M Matuszak, Charles Matrosic, David Jarema, Daniel L McShan, Matthew H Stenmark, Dawn Owen, Shruti Jolly, Feng-Ming Spring Kong, Randall K Ten Haken
PURPOSE: Limits on mean lung dose (MLD) allow for individualization of radiation doses at safe levels for patients with lung tumors. However, MLD does not account for individual differences in the extent or spatial distribution of pulmonary dysfunction among patients, which leads to toxicity variability at the same MLD. We investigated dose rearrangement to minimize the radiation dose to the functional lung as assessed by perfusion single photon emission computed tomography (SPECT) and maximize the target coverage to maintain conventional normal tissue limits...
October 2016: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/28738834/the-value-of-99m-tc-methylene-diphosphonate-single-photon-emission-computed-tomography-computed-tomography-in-diagnosis-of-fibrous-dysplasia
#3
Linqi Zhang, Qiao He, Wei Li, Rusen Zhang
BACKGROUND: Fibrous dysplasia (FD) is a rare benign bone disorder in which the normal bone is replaced by immature fibro-osseous tissue. However, some case reports have reported that FD showed significantly increased (99m)Tc-methylene diphosphonate ((99m)Tc-MDP) uptake on whole-body bone scintigraphy (WBS), which may mimic bone metastasis or skeletal involvement of the patients with known cancer. Thus, the purpose of present study is to observe the reliable characteristics and usefulness of single photon emission computed tomography/computed tomography (SPECT/CT) for the diagnosis of FD...
July 24, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28737581/intense-99mtc-mdp-activity-in-an-elongated-sagging-gallbladder-with-a-partially-calcified-gallstone
#4
Xiangcheng Wang, Xia Bai, Weina Zhou, Xiyan Hao, Xuemei Wang
Intense activity was noted in the right middle abdomen on whole-body Tc-MDP bone scan images, which were obtained in a 78-year-old woman who had back pain. Further SPECT/CT images demonstrated that the intense activity was located in an elongated gallbladder. Partially calcified gallstone was also revealed on SPECT/CT images. Unexpectedly, the gallbladder activity was from the radioactive bile inside the gallbladder lumen, whereas the partially calcified gallstone was relatively photopenic.
July 22, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28737577/vertebral-myeloma-mimicking-prostatic-carcinoma-metastasis-in-68ga-psma-pet-ct
#5
Esben Hoej Merrild, Steen Baerentzen, Kirsten Bouchelouche, Simon Buus
Ga-PSMA PET/CT was performed in a 75-year-old man with newly diagnosed prostate cancer because of an equivocal lesion in the spine both on Tc-bone-SPECT/CT and MRI. Because of increased PSMA activity on PET/CT, the bone lesion was interpreted as metastasis from prostate cancer. Later, the patient was diagnosed as having monoclonal gammopathy of unknown significance. A biopsy was performed, and histological examination revealed multiple myeloma with PSMA expression in the neovessels but no metastatic prostate cancer cells...
July 22, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28736826/impact-of-respiratory-motion-and-acquisition-settings-on-spect-liver-dosimetry-for-radioembolization
#6
Remco Bastiaannet, Max A Viergever, Hugo W A M de Jong
PURPOSE: Respiratory motion may impose significant inaccuracies on emission activity estimation in quantitative SPECT. This effect may be a major issue in dosimetry as used in management of liver radioembolization. The purpose of this study was to investigate the impact of respiratory motion on radioembolization liver dosimetry for different SPECT acquisition settings. METHODS: In a series of SPECT/CT Monte Carlo simulations using several digital XCAT phantoms, the following parameters were varied: breathing/non-breathing, liver tumor size (0...
July 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28734900/molecular-imaging-in-stem-cell-based-therapies-of-cardiac-diseases
#7
REVIEW
Xiang Li, Marcus Hacker
In the past 15years, despite regenerative medicine has shown great potential for cardiovascular diseases, the outcome and safety of stem cell transplantation has shown controversial results in the published literature. Medical imaging might be useful for monitoring and quantification transplanted cells within the heart and to serially characterize the effects of stem cell therapy of the myocardium. From the multiple available noninvasive imaging techniques, magnetic resonance imaging and nuclear imaging by positron (PET) or single photon emission computer tomography (SPECT) are the most used clinical approaches to follow the fate of transplanted stem cells in vivo...
July 19, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28733764/cardiac-sympathetic-neuronal-damage-precedes-myocardial-fibrosis-in-patients-with-anderson-fabry-disease
#8
Massimo Imbriaco, Teresa Pellegrino, Valentina Piscopo, Mario Petretta, Andrea Ponsiglione, Carmela Nappi, Marta Puglia, Serena Dell'Aversana, Eleonora Riccio, Letizia Spinelli, Antonio Pisani, Alberto Cuocolo
PURPOSE: Cardiac sympathetic denervation may be detectable in patients with Anderson-Fabry disease (AFD), suggesting its usefulness for early detection of the disease. However, the relationship between sympathetic neuronal damage measured by (123)I-metaiodobenzylguanidine (MIBG) imaging with myocardial fibrosis on cardiac magnetic resonance (CMR) is still unclear. METHODS: Cardiac sympathetic innervation was assessed by (123)I-MIBG single-photon emission computed tomography (SPECT) in 25 patients with genetically proved AFD...
July 22, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28732592/correlation-between-early-revascularization-and-major-cardiac-events-demonstrated-by-ischemic-myocardium-in-japanese-patients-with-stable-coronary-artery-disease
#9
Shunichi Yoda, Yusuke Hori, Misa Hayase, Takashi Mineki, Takumi Hatta, Yasuyuki Suzuki, Naoya Matsumoto, Atsushi Hirayama
BACKGROUND: There is no report on correlation between early revascularization and the occurrence of major cardiac events (MCEs) except severe heart failure in Japanese patients with stable coronary artery disease (CAD). This study aimed to determine whether early revascularization affected the incidence of MCEs in Japanese patients with stable CAD. METHODS: We retrospectively investigated 3581 stable CAD patients who underwent rest (201)Tl and stress (99m)Tc-tetrofosmin myocardial perfusion single-photon emission computed tomography (SPECT) and provided three-year-prognostic data...
July 18, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28731079/a-polymeric-temozolomide-nanocomposite-against-orthotopic-glioblastoma-xenograft-tumor-specific-homing-directed-by-nestin
#10
Suma Prabhu, Jayant Sastri Goda, Srinivas Mutalik, Bhabani Shankar Mohanty, Pradip Chaudhari, Sharada Rai, Nayanabhirama Udupa, Bola Sadashiva Satish Rao
The development of effective therapeutic strategies for glioblastoma faces challenges such as modulating the blood brain barrier (BBB) for drug influx and selectively targeting tumor cells. Nanocarrier drug delivery strategies are functionalized to enhance vascular permeability. We engineered superparamagnetic iron oxide nanoparticle (SPION) based polymeric nanocomposites (84.37 ± 12.37 nm / 101.56 ± 7.42 nm) embedding temozolomide (TMZ) targeted against glioblastoma by tagging an antibody against nestin, a stem cell marker, and transferrin / polysorbate-80 to permeate the BBB...
July 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28729429/brain-perfusion-imaging-under-acetazolamide-challenge-for-detection-of-impaired-cerebrovascular-reserve-capacity-positive-findings-with-o-15-water-pet-in-patients-with-negative-tc-99m-hmpao-spect
#11
Güliz Acker, Catharina Lange, Imke Schatka, Andreas Pfeifer, Marcus A Czabanka, Peter Vajkoczy, Ralph Buchert
Cerebrovascular reserve capacity (CVRC) is an important parameter for treatment decisions in chronic cerebrovascular diseases. It can be assessed by measuring the acetazolamide-induced change of regional cerebral blood flow using single photon emission computed tomography (SPECT) with Tc-99m-labeled hexamethylpropyleneamine oxime (HMPAO) or positron emission tomography (PET) with O-15-water. Methods: Our database was searched for patients with moyamoya vasculopathy (MMV) or atherosclerotic cerebrovascular disease who had underwent O-15-water PET after normal Tc-99m-HMPAO SPECT with respect to CVRC...
July 20, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28728876/is-technetium-99m-sestamibi-imaging-able-to-predict-pathologic-nonresponse-to-neoadjuvant-chemotherapy-in-breast-cancer-a-meta-analysis-evaluating-current-use-and-shortcomings
#12
Angela Collarino, Elizabeth J de Koster, Renato A Valdés Olmos, Lioe-Fee de Geus-Oei, Lenka M Pereira Arias-Bouda
BACKGROUND: Interest in technetium-99m ((99m)Tc)-sestamibi imaging for neoadjuvant chemotherapy (NAC) response monitoring in locally advanced breast cancer (LABC) is increasing but remains matter of discussion. The present study conducted a meta-analysis of the diagnostic performance of (99m)Tc-sestamibi to predict pathologic nonresponse to NAC for primary LABC. MATERIALS AND METHODS: A systematic data search was performed. Studies with a minimum of 10 LABC patients that had evaluated (99m)Tc-sestamibi imaging for NAC nonresponse using conventional planar scintimammography, breast-specific γ-imaging, and/or single photon emission computed tomography/computed tomography (SPECT/CT) were included...
June 29, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/28726977/added-value-of-spect-spiral-ct-versus-spect-or-ct-alone-in-diagnosing-solitary-skeletal-lesions
#13
Yiqiu Zhang, Beilei Li, Hongcheng Shi, Haojun Yu, Yushen Gu, Yan Xiu
AIM: The aim of this study was to investigate the added value of SPECT/spiral CT versus SPECT or CT alone in the differential diagnosis of solitary skeletal lesions. METHODS: This was a retrospective study on a total of 69 patients who had a solitary skeletal "hot spot" that could not be definitively diagnosed using planar scintigraphy. Thus, SPECT/spiral CT was performed on the indeterminate lesions. SPECT, CT and SPECT/spiral CT images were independently interpreted by two experienced doctors who have both identification of CT and nuclear medicine...
July 20, 2017: Nuklearmedizin. Nuclear Medicine
https://www.readbyqxmd.com/read/28726679/accuracy-of-rhenium-188-spect-ct-activity-quantification-for-applications-in-radionuclide-therapy-using-clinical-reconstruction-methods
#14
Pedro L Esquinas, Carlos F Uribe, M Gonzalez, Cristina Rodríguez-Rodríguez, Urs O Häfeli, Anna Celler
The main applications of (188)Re in radionuclide therapies include trans-arterial liver radioembolization and palliation of painful bone-metastases. In order to optimize (188)Re therapies, the accurate determination of radiation dose delivered to tumors and organs at risk is required. Single photon emission computed tomography (SPECT) can be used to perform such dosimetry calculations. However, the accuracy of dosimetry estimates strongly depends on the accuracy of activity quantification in (188)Re images...
July 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28726076/ejection-fraction-in-myocardial-perfusion-imaging-assessed-with-a-dynamic-phantom-comparison-between-iq-spect-and-lehr
#15
Eero Hippeläinen, Teemu Mäkelä, Touko Kaasalainen, Erna Kaleva
BACKGROUND: Developments in single photon emission tomography instrumentation and reconstruction methods present a potential for decreasing acquisition times. One of such recent options for myocardial perfusion imaging (MPI) is IQ-SPECT. This study was motivated by the inconsistency in the reported ejection fraction (EF) and left ventricular (LV) volume results between IQ-SPECT and more conventional low-energy high-resolution (LEHR) collimation protocols. IQ-SPECT and LEHR quantitative results were compared while the equivalent number of iterations (EI) was varied...
December 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/28723778/thoracic-splenosis-mimicking-a-pleuropneumonia-a-case-report
#16
Aurélie Baldolli, Solène Coeuret, Vincent Le Pennec, Denis Agostini, Renaud Verdon
RATIONALE: Splenosis is the development of one or more heterotopic splenic tissue autoimplants following rupture of the spleen and remains mostly asymptomatic. PATIENT CONCERNS: We report a case of a 50-year old post-traumatic splenectomized man admitted for a left side community acquired pneumonia resistant to antibiotics. DIAGNOSES: The diagnosis of intrathoracic ectopic spleen was suspected because of the history of spleen trauma with diaphragm rupture and the absence of Howell-Jolly bodies...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28721303/value-of-99m-tc-mdp-spect-ct-and-18-f-fdg-pet-ct-scanning-in-the-evaluation-of-malignantly-transformed-fibrous-dysplasia
#17
Wei-Jun Wei, Zhen-Kui Sun, Chen-Tian Shen, Xin-Yun Zhang, Juan Tang, Hong-Jun Song, Zhong-Ling Qiu, Quan-Yong Luo
Although fibrous dysplasia is not considered a potentially premalignant disorder, malignant transformation occurs. Because of its rarity, radiographic features of malignantly transformed fibrous dysplasia on cross-sectional imaging modalities are less recognized, making diagnosis and differential diagnosis of the disease quite difficult in clinical practice. In this study, we analyzed the clinical characteristics, imaging features, pathology findings and surgery strategies of 19 malignantly transformed fibrous dysplasia...
2017: American Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28720528/postoperative-dilatation-of-superficial-temporal-artery-associated-with-transient-neurological-symptoms-after-direct-bypass-surgery-for-moyamoya-angiopathy
#18
Daizo Ishii, Takahito Okazaki, Toshinori Matsushige, Katsuhiro Shinagawa, Nobuhiko Ichinose, Shigeyuki Sakamoto, Kaoru Kurisu
OBJECTIVE: In moyamoya angiopathy (MMA), transient neurological symptoms (TNS) are occasionally observed after superficial temporal artery (STA)-middle cerebral artery (MCA) direct bypass surgery. The purpose of this study was to investigate the correlation between TNS and postoperative MR images, as well as perform a perfusion study. METHODS: A total of 52 hemispheres in 33 consecutive patients with MMA were reviewed. TNS were defined as reversible neurological dysfunction without any apparent intracranial infarction or hemorrhage...
July 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28719445/adefovir-induced-hypophosphatemic-osteomalacia-mimicking-bone-metastases-from-primary-hepatocarcinoma
#19
Wei-Jun Wei, Zhen-Kui Sun, Chen-Tian Shen, Zhong-Ling Qiu, Quan-Yong Luo
Adefovir-induced hypophosphatemic osteomalacia in the context of hepatocarcinoma is rare and needs to be differentiated from metastatic hepatocarcinoma. We here report a case of severe osteomalacia whose focal uptakes of radiotracer on the Tc-MDP SPECT/CT images mimicked that of metastatic hepatocarcinoma.
July 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28718888/assessing-lung-function-using-contrast-enhanced-dual-energy-computed-tomography-for-potential-applications-in-radiation-therapy
#20
Andréanne Lapointe, Houda Bahig, Danis Blais, Hugo Bouchard, Édith Filion, Jean-François Carrier, Stéphane Bedwani
PURPOSE: There is an increasing interest in the evaluation of lung function from physiological images in radiation therapy treatment planning to reduce the extent of post-radiation toxicities. The purpose of this work is to retrieve reliable functional information from contrast-enhanced dualenergy computed tomography (DECT) for new applications in radiation therapy. The functional information obtained by DECT is also compared with other methods using single energy CT (SECT) and single-photon emission computed tomography (SPECT) with CT...
July 18, 2017: Medical Physics
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