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https://www.readbyqxmd.com/read/29667156/how-we-manage-patients-with-plasmacytomas
#1
REVIEW
Despina Fotiou, Meletios A Dimopoulos, Efstathios Kastritis
PURPOSE OF REVIEW: To discuss the diagnostic approach, treatment options, and future considerations in the management of plasmacytomas, either solitary or in the context of overt multiple myeloma (MM). RECENT FINDINGS: Advanced imaging techniques such as whole-body magnetic resonance imaging and positron emission tomography/computerized tomography are essential for the diagnostic workup of solitary plasmacytomas (SP) to rule out the presence of other disease foci...
April 17, 2018: Current Hematologic Malignancy Reports
https://www.readbyqxmd.com/read/29667143/diagnostic-performance-of-18-f-fdg-pet-ct-and-whole-body-diffusion-weighted-imaging-with-background-body-suppression-dwibs-in-detection-of-lymph-node-and-bone-metastases-from-pediatric-neuroblastoma
#2
Hiroaki Ishiguchi, Shinji Ito, Katsuhiko Kato, Yusuke Sakurai, Hisashi Kawai, Naotoshi Fujita, Shinji Abe, Atsushi Narita, Nobuhiro Nishio, Hideki Muramatsu, Yoshiyuki Takahashi, Shinji Naganawa
OBJECTIVE: Recent many studies have shown that whole body "diffusion-weighted imaging with background body signal suppression" (DWIBS) seems a beneficial tool having higher tumor detection sensitivity without ionizing radiation exposure for pediatric tumors. In this study, we evaluated the diagnostic performance of whole body DWIBS and 18 F-FDG PET/CT for detecting lymph node and bone metastases in pediatric patients with neuroblastoma. METHODS: Subjects in this retrospective study comprised 13 consecutive pediatric patients with neuroblastoma (7 males, 6 females; mean age, 2...
April 17, 2018: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/29667102/body-size-and-tube-voltage-dependent-guiding-equations-for-optimal-selection-of-image-acquisition-parameters-in-clinical-x-ray-imaging
#3
Xiaoming Zheng
The purpose of this work was to present body size and tube voltage-dependent equations for optimal selection of image acquisition parameters in guiding clinical X-ray imaging. The dose output of X-ray tubes was expressed as a function of the image acquisition parameters of tube voltage (kVp), tube current-exposure time product (mAs), and body size (d). Dose power (n) to kVp was determined to be a linear function of body size in an earlier phantom study. Tube voltage-dependent attenuation coefficients of water were used to determine the kVp effect on the depth dose of X-rays from the body's entrance surface...
April 17, 2018: Radiological Physics and Technology
https://www.readbyqxmd.com/read/29666994/whole-body-mri-in-spondyloarthritis-spa-preliminary-results-suggest-that-dwi-outperforms-stir-for-lesion-detection
#4
Frederic E Lecouvet, Nicolas Vander Maren, Laurence Collette, Nicolas Michoux, Perrine Triqueneaux, Maria Stoenoiu, Frederic Houssiau, Jacques Malghem, Marie-Laurence Denis, Ahmed Larbi, Adrien Nzeusseu Toukap
PURPOSE: To compare the diagnostic accuracy of DWI and STIR sequences in Whole body (WB) MRI of SpA patients. MATERIALS AND METHODS: Twenty consecutive patients with confirmed active SpA and 20 controls were investigated with identical WB MRI protocols, including DWI and STIR images. Two observers recorded 'lesions' (high signal intensity foci on STIR and high b-value DWI) in 17 anatomical areas, making a 17-point 'area score' and a 40-point 'lesion score'. ROC performance, inter-observer agreement, correlation with clinical parameters and spine and sacro-iliac joints (SIJ) MRI scores were assessed...
April 17, 2018: European Radiology
https://www.readbyqxmd.com/read/29666907/three-dimensional-analysis-of-nuclear-heterochromatin-distribution-during-early-development-in-the-rabbit
#5
Amélie Bonnet-Garnier, Kiên Kiêu, Tiphaine Aguirre-Lavin, Krisztina Tar, Pierre Flores, Zichuan Liu, Nathalie Peynot, Martine Chebrout, András Dinnyés, Véronique Duranthon, Nathalie Beaujean
Changes to the spatial organization of specific chromatin domains such as constitutive heterochromatin have been studied extensively in somatic cells. During early embryonic development, drastic epigenetic reprogramming of both the maternal and paternal genomes, followed by chromatin remodeling at the time of embryonic genome activation (EGA), have been observed in the mouse. Very few studies have been performed in other mammalian species (human, bovine, or rabbit) and the data are far from complete. During this work, we studied the three-dimensional organization of pericentromeric regions during the preimplantation period in the rabbit using specific techniques (3D-FISH) and tools (semi-automated image analysis)...
April 18, 2018: Chromosoma
https://www.readbyqxmd.com/read/29666795/cell-chirality-drives-left-right-asymmetric-morphogenesis
#6
REVIEW
Mikiko Inaki, Takeshi Sasamura, Kenji Matsuno
Most macromolecules found in cells are chiral, meaning that they cannot be superimposed onto their mirror image. However, cells themselves can also be chiral, a subject that has received little attention until very recently. In our studies on the mechanisms of left-right (LR) asymmetric development in Drosophila , we discovered that cells can have an intrinsic chirality to their structure, and that this "cell chirality" is generally responsible for the LR asymmetric development of certain organs in this species...
2018: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/29666701/beyond-weight-loss-establishing-a-postbariatric-surgery-patient-support-group-what-do-patients-want
#7
Saira Hameed, Victoria Salem, Tricia M Tan, Alma Collins, Krishna Shah, Samantha Scholtz, Ahmed R Ahmed, Harvinder Chahal
Purpose: There are limited resources for long-term specialist follow-up after bariatric surgery. In selected centres, patients can access a postoperative support group, but there is no clear evidence to guide their delivery. Materials and Methods: A retrospective study of bariatric surgery patients ( n  = 152) who had been discharged from specialist follow-up (mean time since surgery 5.5 years), covering weight history, physical and psychosocial comorbidities, and the need for a postoperative bariatric support group...
2018: Journal of Obesity
https://www.readbyqxmd.com/read/29666663/scenario-screen-a-dynamic-and-context-dependent-p300-stimulator-screen-aimed-at-wheelchair-navigation-control
#8
Omar Piña-Ramirez, Raquel Valdes-Cristerna, Oscar Yanez-Suarez
P300 spellers have been widely modified to implement nonspelling tasks. In this work, we propose a "scenario" stimulation screen that is a P300 speller variation to command a wheelchair. Our approach utilized a stimulation screen with an image background (scenario snapshot for a wheelchair) and stimulation markers arranged asymmetrically over relevant landmarks, such as suitable paths, doors, windows, and wall signs. Other scenario stimulation screen features were green/blue stimulation marker color scheme, variable Interstimulus Interval, single marker stimulus mode, and optimized stimulus sequence generator...
2018: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/29666563/do-tsh-ft3-and-ft4-impact-bat-visualization-of-clinical-fdg-pet-ct-images
#9
Ryuichi Nishii, Shigeki Nagamachi, Youichi Mizutani, Tamasa Terada, Syogo Kiyohara, Hideyuki Wakamatsu, Seigo Fujita, Tatsuya Higashi, Keiichiro Yoshinaga, Tsuneo Saga, Toshinori Hirai
Objective: We retrospectively analyzed activated BAT visualization on FDG-PET/CT in patients with various conditions and TH levels to clarify the relationships between visualization of BAT on FDG-PET/CT and the effect of TH. Methods: Patients who underwent clinical FDG-PET/CT were reviewed and we categorized patients into 5 groups: (i) thyroid hormone withdrawal (THW) group; (ii) recombinant human thyrotropin (rhTSH) group; (iii) hypothyroidism group; (iv) hyperthyroidism group; and (v) BAT group...
2018: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29666031/measurement-of-left-atrial-volume-by-2d-and-3d-non-contrast-computed-tomography-compared-with-cardiac-magnetic-resonance-imaging
#10
Maise Høigaard Fredgart, Rasmus Carter-Storch, Jacob Eifer Møller, Kristian Altern Øvrehus, Redi Pecini, Jordi Sanchez Dahl, Oke Gerke, Roudyna Ahmad Alturkmany, Axel Brandes, Jes Sanddal Lindholt, Axel Cosmus Pyndt Diederichsen
BACKGROUND: Cardiac magnetic resonance imaging (MRI) is considered the gold standard for assessment of left atrial (LA) volume. We assessed the feasibility of evaluating LA volume using 3D non-contrast computed tomography (NCCT). Furthermore, since manual tracing of LA volume is time consuming, we evaluated the accuracy of the LA area using 2D NCCT imaging for LA volume assessment. METHODS: MRI and NCCT imaging were performed in 69 patients before and one year after aortic valve replacement...
April 10, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29665980/quality-of-life-and-anterior-resection-syndrome-after-surgery-for-mid-to-low-rectal-cancer-a-cross-sectional-study
#11
Loris Trenti, Ana Galvez, Sebastiano Biondo, Alejandro Solis, Francesc Vallribera-Valls, Eloy Espin-Basany, Alvaro Garcia-Granero, Esther Kreisler
BACKGROUND: The aim of this study was to analyze the quality of life (QoL), low anterior resection syndrome (LARS) and fecal incontinence after surgery for mid to low rectal cancer and its relationship with the type of surgical procedure performed. METHODS: A cross-sectional cohort survey study of 358 patients operated on for mid to low rectal cancer. Patients were included in three groups: abdominoperineal resection (APR), low mechanical colorectal anastomosis (CRA) and hand-sewn coloanal anastomosis (CAA)...
April 4, 2018: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29665707/relationship-between-kurtosis-and-bi-exponential-characterization-of-high-b-value-diffusion-weighted-imaging-application-to-prostate-cancer
#12
Roshan A Karunamuni, Joshua Kuperman, Tyler M Seibert, Natalie Schenker, Rebecca Rakow-Penner, V S Sundar, Jose R Teruel, Pal E Goa, David S Karow, Anders M Dale, Nathan S White
Background High b-value diffusion-weighted imaging has application in the detection of cancerous tissue across multiple body sites. Diffusional kurtosis and bi-exponential modeling are two popular model-based techniques, whose performance in relation to each other has yet to be fully explored. Purpose To determine the relationship between excess kurtosis and signal fractions derived from bi-exponential modeling in the detection of suspicious prostate lesions. Material and Methods This retrospective study analyzed patients with normal prostate tissue (n = 12) or suspicious lesions (n = 13, one lesion per patient), as determined by a radiologist whose clinical care included a high b-value diffusion series...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29665490/smaller-hippocampal-volume-in-current-but-not-in-past-depression-in-comparison-to-healthy-controls-minor-evidence-from-an-older-adults-sample
#13
Ismaïl Bensassi, Jorge Lopez-Castroman, Jerome J Maller, Chantal Meslin, Marilyn Wyart, Karen Ritchie, Philippe Courtet, Sylvaine Artero, Raffaella Calati
BACKGROUND: Structural neuroimaging studies revealed a consistent pattern of volumetric reductions in both hippocampus (HC) and anterior cingulate cortex (ACC) of individuals with major depressive episode(s) (MDE). This study investigated HC and ACC volume differences in currently depressed individuals (n = 150), individuals with a past lifetime MDE history (n = 79) and healthy controls (n = 287). METHODS: Non-demented individuals were recruited from a cohort of community-dwelling older adults (ESPRIT study)...
April 9, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29665140/review-functional-and-hybrid-imaging-of-bone-metastases
#14
Gary J R Cook, Vicky Goh
Bone metastases are common, cause significant morbidity and impact on healthcare resources. While radiographs, computed tomography (CT), magnetic resonance imaging (MRI) and bone scintigraphy have frequently been used for staging the skeleton, it is recognized that these methods are insensitive and non-specific for monitoring treatment response in a clinically relevant time frame. We summarize several recent reports on new functional and hybrid imaging methods including single photon emission CT / CT, positron emission tomography / CT and whole-body MRI with diffusion-weighted imaging...
April 17, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29665104/understanding-the-in-vivo-fate-of-radioimmunoconjugates-for-pet-and-spect
#15
Delphine Vivier, Sai Kiran Sharma, Brian M Zeglis
Over the past 25 years, antibodies have emerged as extraordinarily promising vectors for the delivery of radionuclides to tumors for nuclear imaging. While radioimmunoconjugates often produce very high activity concentrations in target tissues, they also are frequently characterized by elevated activity concentrations in healthy organs as well. The root of this background uptake lies in the complex network of biological interactions between the radioimmunoconjugate and the subject. In this review, we seek to provide an overview of these interactions and thus paint a general picture of the in vivo fate of radioimmunoconjugates...
April 17, 2018: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/29665086/severely-impaired-bone-material-quality-in-chihuahua-zebrafish-resembles-classical-dominant-human-osteogenesis-imperfecta
#16
Imke A K Fiedler, Felix N Schmidt, Eva M Wölfel, Christine Plumeyer, Petar Milovanovic, Roberta Gioia, Francesca Tonelli, Hrishikesh A Bale, Katharina Jähn, Roberta Besio, Antonella Forlino, Björn Busse
Excessive skeletal deformations and brittle fractures in the vast majority of patients suffering from osteogenesis imperfecta (OI) are a result of substantially reduced bone quality. Since the mechanical competence of bone is dependent on the tissue characteristics at small length scales, it is of crucial importance to assess how osteogenesis imperfecta manifests at the micro- and nanoscale of bone. In this context, the Chihuahua (Chi/ +) zebrafish, carrying a heterozygous glycine substitution in the α1 chain of collagen type I, has recently been proposed as suitable animal model of classical dominant OI, showing skeletal deformities, altered mineralization patterns and a smaller body size...
April 17, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29664918/effect-of-arm-position-presence-of-medical-devices-and-off-centering-during-acquisition-of-scout-image-on-automatic-tube-voltage-selection-and-current-modulation-in-pediatric-chest-ct
#17
Young Jin Ryu, Young Hun Choi, Jung-Eun Cheon, Ji Eun Park, Woo Sun Kim, In-One Kim
PURPOSE: To evaluate the patients' morphologic factors affecting radiation dose in pediatric chest CT. MATERIALS AND METHODS: From November 2013 to May 2015, 315 pediatric chest CT scans were obtained using a CT scanner, and classified into 5 groups according to the patients' age. For each age group, the chest CT scans were divided into two subgroups. A cut-off value used was the 75th percentile of size-specific dose estimates (SSDE), age-specific diagnostic reference level (DRL): less than the 75th percentile of SSDE (Group A, n = 238) and greater than the 75th percentile of SSDE (Group B, n = 77)...
2018: PloS One
https://www.readbyqxmd.com/read/29664812/health-related-quality-of-life-and-body-image-disturbance-of-adolescents-with-severe-untreated-idiopathic-early-onset-scoliosis-in-a-developing-country
#18
Hany Abdel Gawwad Soliman
STUDY DESIGN: A cross sectional study OBJECTIVE.: This study aimed to investigate the health-related quality of life (HRQOL) and body image disturbance of adolescents with untreated severe idiopathic early-onset scoliosis (IEOS) in a developing country. SUMMARY OF BACKGROUND DATA: IEOS has the potential to progress rapidly and may lead to significant disability if left untreated. Moreover, it can lead to significant body image changes that may lead to social and psychological stresses on developing adolescents...
April 16, 2018: Spine
https://www.readbyqxmd.com/read/29664200/prevalence-and-determinants-of-left-ventricular-diastolic-dysfunction-in-obese-subjects-and-the-role-of-left-ventricular-global-longitudinal-strain-and-mass-normalized-to-height
#19
Frank Lloyd Dini, Iacopo Fabiani, Mario Miccoli, Gian Giacomo Galeotti, Nicola Riccardo Pugliese, Andreina D'Agostino, Alessandra Scartabelli, Lorenzo Conte, Guido Salvetti, Ferruccio Santini, Roberto Pedrinelli
BACKGROUND: Left ventricular (LV) diastolic dysfunction (DD) is a frequent finding in obesity and may predispose to the development of heart failure (HF). However, no data are available on the prevalence of DD after the introduction of the 2016 Recommendations of the American Society of Echocardiography and the European Association of Cardiovascular Imaging. METHODS AND RESULTS: To assess the impact of the new Recommendations on the prevalence of DD and on their clinical and echocardiographic correlates in obesity, a prospective study was performed in 588 subjects with an ejection fraction (EF) ≥50% and no history of HF either obese (n = 402; mean age: 47 ± 12 years; women 71%; body mass index [BMI]: 44 ± 8 kg/m2 ), overweight (n = 86; BMI: 28 ± 1 kg/m2 ), or with a normal weight (n = 100; BMI: 22 ± 2 kg/m2 )...
April 17, 2018: Echocardiography
https://www.readbyqxmd.com/read/29664058/relationships-between-rapid-eye-movement-sleep-behavior-disorder-and-neurodegenerative-diseases-clinical-assessments-biomarkers-and-treatment
#20
REVIEW
Min Li, Li Wang, Jiang-Hong Liu, Shu-Qin Zhan
Objective: Rapid eye movement sleep behavior disorder (RBD) is characterized by dream enactment and loss of muscle atonia during rapid eye movement sleep. RBD is closely related to α-synucleinopathies including Parkinson's disease, dementia with Lewy bodies, and multiple system atrophy. Many studies have investigated the markers of imaging and neurophysiological, genetic, cognitive, autonomic function of RBD and their predictive value for neurodegenerative diseases. This report reviewed the progress of these studies and discussed their limitations and future research directions...
April 20, 2018: Chinese Medical Journal
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