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https://www.readbyqxmd.com/read/28181381/changes-in-penile-length-after-radical-prostatectomy-investigation-of-the-underlying-anatomical-mechanism
#1
Yoshifumi Kadono, Kazuaki Machioka, Kazufumi Nakashima, Masashi Iijima, Kazuyoshi Shigehara, Takahiro Nohara, Kazutaka Narimoto, Kouji Izumi, Yasuhide Kitagawa, Hiroyuki Konaka, Toshifumi Gabata, Atsushi Mizokami
OBJECTIVE: To measure changes in penile length (PL) over time before and after radical prostatectomy (RP), and to investigate the underlying mechanisms for these changes. PATIENTS AND METHODS: The stretched PL (SPL) of 102 patients was measured before, 10 days after, and at 1, 3, 6, 9, 12, 18 and 24 months after RP. The perpendicular distance from the distal end of the membranous urethra to the midline of the pelvic outlet was measured on mid-sagittal magnetic resonance imaging (MRI) slice at three time points: preoperatively; 10 days after RP; and 12 months after RP...
February 8, 2017: BJU International
https://www.readbyqxmd.com/read/28163853/bilateral-cryptorchidism-a-rare-presentation-for-persistent-m%C3%A3-llerian-duct-syndrome
#2
Abdullah Al-Faris, Mosleh Jabari, Mohammed Al-Sayed, Hassan Al-Shehri
Persistent Müllerian duct syndrome (PMDS) is a rare, sex-limited, autosomal recessive disorder representing male pseudo-hermaphroditism. It is observed in males with the presence of female reproductive organs such as the uterus, cervix, and bilateral fallopian tubes along with normally developed male reproductive organs. It generally occurs during embryogenesis due to mutation in anti-Müllerian hormone (AMH) gene, i.e., AMH gene or AMH receptor (AMHR2) gene. The present case reports a male infant with inflammation in the right groin who was admitted to Security Forces Hospital in 2015...
December 2016: Electronic Physician
https://www.readbyqxmd.com/read/28162865/what-to-expect-when-they-are-expecting-magnetic-resonance-imaging-of-the-acute-abdomen-and-pelvis-in-pregnancy
#3
REVIEW
Hemang M Kotecha, Lacey J McIntosh, Hao S Lo, Byron Y Chen, Carolyn S Dupuis
In this article, we discuss the challenges in the diagnosis of acute abdominopelvic pain in pregnant patients, role of imaging, and advantages of MRI over other modalities. Methods consist of pictorial review. We review the differential diagnoses and illustrate the MRI findings in pregnant patients with acute abdominopelvic pain, including gastrointestinal, gynecologic, urologic, and vascular etiologies.
December 15, 2016: Current Problems in Diagnostic Radiology
https://www.readbyqxmd.com/read/28133087/-a-case-of-carcinoma-associated-with-an-anal-fistula-repaired-using-a-hatchet-flap-after-neoadjuvant-chemoradiotherapy
#4
Masatoshi Kuroda, Eiji Ikeda, Nobuji Yokoyama, Masaichi Kenmotsu, Shoji Takagi, Toshihisa Yamano
The patient was a 53-year-old man who complained of perianal pain. He had a 20-year history of an anal fistula. There was a 10 cm tumor with mucin-like discharge on the left side of the anus. His CEA level was high, at 7.3 ng/mL, and T2-weighted MRI revealed a multilocular cystic tumor with high signal intensity. The second biopsy result indicated mucinous adenocarcinoma. We performed neoadjuvant chemoradiotherapy. The chemotherapy regimen was TS-1 with radiation therapy, along with 4-port irradiation(50.4 Gy)of the primary tumor, located at the interior of the pelvis and inguinal lymph nodes...
November 2016: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28125816/comparative-anatomy-of-the-ovine-and-female-pelvis
#5
Iva Urbankova, Katarina Vdoviakova, Rita Rynkevic, Nikhil Sindhwani, Dries Deprest, Andrew Feola, Paul Herijgers, Ladislav Krofta, Jan Deprest
BACKGROUND: Pelvic organ prolapse affects half of vaginally parous women. Several animal models are used to study its pathophysiology and treatment. Sheep are interesting because they develop spontaneously prolapse with similar risk factors as women and can be used for vaginal surgery. This study describes ovine pelvis anatomy and compares it to women's pelvis to provide anatomical tools for translational researchers. METHODS: MRI, pelvic dissections, and histology were used for detailed macro- and microscopic analysis of relevant anatomical structures in 6 nulliparous ewes...
January 27, 2017: Gynecologic and Obstetric Investigation
https://www.readbyqxmd.com/read/28124535/does-mri-help-in-the-pre-operative-evaluation-of-pelvic-fracture-urethral-distraction-defect-a-pilot-study
#6
Rajadoss Muthukrishna Pandian, Nirmal Thampi John, Anu Eapen, B Antonisamy, Antony Devasia, Nitin Kekre
OBJECTIVES: To study the usefulness of MRI in preoperative evaluation of PFUDD. Can MRI provide additional information on urethral distraction defect (UDD) and cause of erectile dysfunction (ED)? MATERIALS AND METHODS: In this prospective study, consecutive male patients presenting with PFUDD were included from Feb 2011 till Dec 2012. Those with traumatic spinal cord injury and pre-existing ED were excluded. Patients were assessed using IIEF questionnaire, retrograde urethrogram and micturating cystourethrogram (RGU+MCU) and MRI pelvis...
January 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/28124074/mri-visible-fe3o4-polypropylene-mesh-3d-reconstruction-of-spatial-relation-to-bony-pelvis-and-neurovascular-structures
#7
Luyun Chen, Florian Lenz, Céline D Alt, Christof Sohn, John O De Lancey, Kerstin A Brocker
INTRODUCTION AND HYPOTHESIS: To demonstrate mesh magnetic resonance imaging (MRI) visibility in living women, the feasibility of reconstructing the full mesh course in 3D, and to document its spatial relationship to pelvic anatomical structures. METHODS: This is a proof of concept study of three patients from a prospective multi-center trial evaluating women with anterior vaginal mesh repair using a MRI-visible Fe3O4 polypropylene implant for pelvic floor reconstruction...
January 25, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28112410/hybrid-zte-dixon-mr-based-attenuation-correction-for-quantitative-uptake-estimation-of-pelvic-lesions-in-pet-mri
#8
Andrew P Leynes, Jaewon Yang, Dattesh D Shanbhag, Sandeep S Kaushik, Youngho Seo, Thomas A Hope, Florian Wiesinger, Peder E Z Larson
PURPOSE: This study introduces a new hybrid ZTE/Dixon MR-based attenuation correction (MRAC) method including bone density estimation for PET/MRI and quantifies the effects of bone attenuation on metastatic lesions uptake in the pelvis. METHODS: Six patients with pelvic lesions were scanned using fluorodeoxyglucose (18F-FDG) in an integrated time-of-flight (TOF) PET/MRI system. For PET attenuation correction, MR imaging consisted of two-point Dixon and zero echo-time (ZTE) pulse sequences...
January 23, 2017: Medical Physics
https://www.readbyqxmd.com/read/28048910/su-g-jep2-10-on-the-need-for-a-dynamic-model-for-patient-specific-distortion-corrections-for-mr-only-pelvis-treatment-planning
#9
C Glide-Hurst, W Zheng, C Stehning, S Weiss, S Renisch
PURPOSE: Patient-specific distortions, particularly near tissue/air interfaces, require assessment and possible corrections for MRI-only radiation treatment planning (RTP). However, patients are dynamic due to changes in physiological status and motion during imaging sessions. This work investigated the need for dynamic patient-specific distortion corrections to support pelvis MR-only RTP. METHODS: The pelvises of healthy volunteers were imaged at 1.0T, 1.5T, and 3...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047989/tu-ab-bra-03-atlas-based-algorithms-with-local-registration-goodness-weighting-for-mri-driven-electron-density-mapping
#10
R Farjam, N Tyagi, H Veeraraghavan, A Apte, K Zakian, M Hunt, J Deasy
PURPOSE: To develop image-analysis algorithms to synthesize CT with accurate electron densities for MR-only radiotherapy of head & neck (H&N) and pelvis anatomies. METHODS: CT and 3T-MRI (Philips, mDixon sequence) scans were randomly selected from a pool of H&N (n=11) and pelvis (n=12) anatomies to form an atlas. All MRIs were pre-processed to eliminate scanner and patient-induced intensity inhomogeneities and standardize their intensity histograms. CT and MRI for each patient were then co-registered to construct CT-MRI atlases...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047295/tu-h-206-04-an-effective-homomorphic-unsharp-mask-filtering-method-to-correct-intensity-inhomogeneity-in-daily-treatment-mr-images
#11
D Yang, H Gach, H Li, S Mutic
PURPOSE: The daily treatment MRIs acquired on MR-IGRT systems, like diagnostic MRIs, suffer from intensity inhomogeneity issue, associated with B1 and B0 inhomogeneities. An improved homomorphic unsharp mask (HUM) filtering method, automatic and robust body segmentation, and imaging field-of-view (FOV) detection methods were developed to compute the multiplicative slow-varying correction field and correct the intensity inhomogeneity. The goal is to improve and normalize the voxel intensity so that the images could be processed more accurately by quantitative methods (e...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047055/su-g-jep2-06-dosimetric-and-workflow-evaluation-of-first-commercial-synthetic-ct-software-for-clinical-use-in-pelvis
#12
N Tyagi, J Zhang, L Happersett, M Kadbi, J Mechalakos, J Deasy, M Hunt
PURPOSE: evaluate a commercial synthetic CT (syn-CT) software for use in prostate radiotherapy METHODS: Twenty prostate patients underwent CT and MR simulation scans in treatment position on a 3T Philips scanner. The MR protocol consisted of a T2w turbo spin-echo for soft tissue contrast, a 2D balanced-fast field echo (b-FFE) for fiducial identification, a dual-echo 3D FFE B0 map for distortion analysis and a 3D mDIXON FFE sequence to generate syn-CT. Two echoes are acquired during mDIXON scan, allowing water, fat, and in-phase images to be derived using the frequency shift of the fat and water protons...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047002/su-f-r-25-automatic-identification-of-suspicious-recurrent-residual-disease-regions-after-prostatectomy
#13
N A Parra, M Abramowitz, A Pollack, R Stoyanova
PURPOSE: To automatically identify and outline suspicious regions of recurrent or residual disease in the prostate bed using Dynamic Contrast Enhanced-MRI (DCE-MRI) in patients after prostatectomy. METHODS: Twenty-two patients presenting for salvage radiotherapy and with identified Gross Tumor Volume (GTV) in the prostate bed were retrospectively analyzed. The MRI data consisted of Axial T2weighted-MRI (T2w) of the pelvis: resolution 1.25×1.25×2.5 mm; Field of View (FOV): 320×320 mm; slice thickness=2...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046967/su-g-iep1-09-mri-evaluation-of-a-direction-modulated-brachytherapy-dmbt-tandem-applicator-for-cervical-cancer-on-3t
#14
A Soliman, D Han, A Elzibak, H Safigholi, S Mashouf, A Owrangi, A Ravi, W Song
PURPOSE: To assess image quality and artifact extent of a novel direction modulated brachytherapy (DMBT) tandem applicator on a 3T MRI using various clinical imaging sequences. METHODS: The tandem applicator is composed of a tungsten alloy with 6 peripheral grooves covered with a PEEK tip. An MR-compatible phantom with similar dimensions to the female pelvis was manufactured. To visually assess the spatial shift of the applicator's tip, a mountable radial-fiducial with 4 plastic rods, each of 3mm diameter, was designed to tightly fit on the applicator...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28042048/gross-hematuria-in-infancy-a-case-of-renal-hemangioma-managed-endoscopically
#15
Bruce J Schlomer
A case of renal hemangioma in a male infant managed endoscopically is reported. The patient initially presented at 6 months of age to a nephrology clinic with gross hematuria and was found to have what was thought to be a renal cyst. He was referred to urology clinic at 18 months after having continued gross hematuria and negative nephrology evaluation. A magnetic resonance imaging suggested an enhancing mass in the renal pelvis and hydronephrotic upper pole cyst that was mistaken as cyst on ultrasound. A 1...
December 29, 2016: Urology
https://www.readbyqxmd.com/read/28031042/transitional-cell-carcinoma-with-extension-of-the-renal-vein-and-ivc-tumor-thrombus-report-of-three-cases-and-literature-review
#16
Mingyang Li, An Shi, Wen Kong, Jin Zhang, Yonghui Chen, Jiwei Huang, Yiran Huang
BACKGROUND: Transitional cell carcinoma (TCC) originating from the renal pelvis with a venous tumor thrombus is a rare entity. However, clinicians should be aware of it because of its high malignancy and poor prognosis. CASE PRESENTATION: Here, we report three cases of pathologically confirmed TCC originating from the renal pelvis with extension into the renal vein or inferior vena cava (IVC). Of these patients, two are males and one is female (58~73 years old)...
December 28, 2016: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28011890/idiopathic-myelofibrosis-with-disseminated-hepatosplenic-mesenteric-renal-and-pulmonary-extramedullary-haematopoeisis-portal-hypertension-and-tuberculosis-initial-presentation-and-2%C3%A2-years-follow-up
#17
Ananya Panda, Sheragaru Hanumanthappa Chandrashekhara, Aruna Nambirajan, Pravas Mishra
A 35-year-old man with a 12-year history of idiopathic myelofibrosis (IMF) presented in 2014 with fatigue and abdominal distension. CT scan revealed massive hepatosplenomegaly with focal splenic lesions, soft tissue around renal pelvis, mesenteric masses compressing bowel loops and perilymphatic nodules in lungs. There was portal hypertension, ascites, pleural effusion, bilateral psoas abscesses and necrotic retroperitoneal lymphadenopathy. MRI additionally revealed hypointense periportal infiltrative lesions in liver, not seen on CT scan...
December 23, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/28011045/diffusion-weighted-magnetic-resonance-imaging-as-a-predictor-of-outcome-in-cervical-cancer-after-chemoradiation
#18
Jennifer C Ho, Pamela K Allen, Priya R Bhosale, Gaiane M Rauch, Clifton D Fuller, Abdallah S R Mohamed, Michael Frumovitz, Anuja Jhingran, Ann H Klopp
PURPOSE: To determine whether apparent diffusion coefficient (ADC) value is predictive of survival after definitive chemoradiation for cervical cancer independent of established imaging and clinical prognostic factors. METHODS AND MATERIALS: Between 2011 and 2013, the pretreatment MRI scans for 69 patients treated with definitive chemoradiation for newly diagnosed cervical cancer were retrieved. Scans were acquired with a 1.5-T magnetic resonance scanner, including diffusion-weighted imaging sequences...
March 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28009753/efficacy-and-safety-of-selective-arterial-embolization-in-the-treatment-of-aneurysmal-bone-cyst-of-the-mobile-spine-a-retrospective-observational-study
#19
Silvia Terzi, Alessandro Gasbarrini, Mario Fuiano, Giovanni Barbanti Brodano, Riccardo Ghermandi, Stefano Bandiera, Stefano Boriani
STUDY DESIGN: Retrospective observational study. OBJECTIVE: Our aim is to define the efficacy and safety of serial selective arterial embolization (SAE) in the treatment of aneurysmal bone cysts, to explore potential treatment alternatives and to define a therapeutic algorithm. SUMMARY OF BACKGROUND DATA: Aneurysmal bone cyst (ABC) is a benign lesion with unpredictable behavior. Its treatment is challenging especially in poorly accessible surgical areas, such as spine and pelvis...
December 22, 2016: Spine
https://www.readbyqxmd.com/read/28003610/the-impact-of-gadolinium-based-contrast-agent-for-carbon-ion-radiotherapy
#20
Nao Mogi, Makoto Sakai, Ryosuke Okada, Yusuke Itabashi, Yasuhiro Fukushima, Yoshiki Kubota, Takayuki Sutou, Takashi Nakano, Tatsuya Ohno
PURPOSE: The contrast agent used in the diagnostic department has high atomic numbers and might influence dose deposition in the particle therapy. In particular, the influence of gadolinium-based (Gd) contrast agent on range in carbon ion radiotherapy has not yet been evaluated. For this reason, we avoid carbon treatment and planning computed tomography (CT) acquisition on days when the contrast-enhanced magnetic resonance image (MRI) is performed. In this study, we evaluated the time required for this beam range effect to vanish by evaluating the temporal changes in the CT values after an enhanced MRI as well as the stopping power of Gd solution...
2016: Nihon Hoshasen Gijutsu Gakkai Zasshi
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