keyword
MENU ▼
Read by QxMD icon Read
search

Mri rectum

keyword
https://www.readbyqxmd.com/read/28089690/mri-evaluation-of-rectal-cancer-staging-and-restaging
#1
REVIEW
Courtney C Moreno, Patrick S Sullivan, Pardeep K Mittal
Magnetic resonance imaging (MRI) plays an important role in the staging and restaging of rectal cancer. Multiplanar high-resolution (≤3-mm section thickness) T2-weighted images are the primary sequences used for rectal cancer staging. No preprocedural bowel cleansing regimen, intravenous contrast material, nor endorectal coil is necessary. MRI is highly accurate for differentiating T1-T2 disease from T3 and T4 disease, an important distinction as patients with T3 and T4 tumors typically undergo preoperative neoadjuvant chemoradiation before resection...
November 21, 2016: Current Problems in Diagnostic Radiology
https://www.readbyqxmd.com/read/28071947/presacral-abscess-as-a-rare-complication-of-sacral-nerve-stimulator-implantation
#2
A Gumber, S Ayyar, H Varia, S Pettit
A 50-year-old man with intractable anal pain attributed to proctalgia fugax underwent insertion of a sacral nerve stimulator via the right S3 vertebral foramen for pain control with good symptomatic relief. Thirteen months later, he presented with signs of sepsis. Computed tomography (CT) and magnetic resonance imaging (MRI) showed a large presacral abscess. MRI demonstrated increased enhancement along the pathway of the stimulator electrode, indicating that the abscess was caused by infection introduced at the time of sacral nerve stimulator placement...
January 10, 2017: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/28065369/the-stratification-of-severity-of-acute-radiation-proctopathy-after-radiotherapy-for-cervical-carcinoma-using-diffusion-weighted-mri
#3
Xiang Sheng Li, Hong Fang, Yunlong Song, Dechang Li, Yingjie Wang, Hongxian Zhu, Limin Meng, Ping Wang, Dong Wang, Hongxia Fan
OBJECTIVE: To determine whether diffusion-weighted imaging (DWI) can be used for quantitatively evaluating severity of acute radiation proctopathy after radiotherapy for cervical carcinoma. MATERIALS AND METHODS: One hundred and twenty-four patients with cervical carcinoma underwent MR examination including DWI before and after radiotherapy. Acute radiation proctopathy was classified into three groups (grade 0, grade I-II and grade III-IV) according to Toxicity Criteria of the Radiation Therapy Oncology Group (RTOG)...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28048869/su-f-j-145-mri-guided-interventional-boost-radiotherapy-for-rectal-cancer-investigating-the-feasibility-of-adapting-the-anatomy
#4
J J E Kleijnen, A M Couwenberg, B van Asselen, J J W Lagendijk, M Intven, B W Raaymakers
PURPOSE: The recent development of an MRI-linac allows adaptation of treatments to the anatomy of the moment. This anatomy, in turn, could be altered into a more favorable situation for radiotherapy purposes. The purpose of this study is to investigate the potential dosimetric benefits of manipulating rectal anatomy in MRI-guided interventional external-beam radiotherapy for rectal cancer. METHODS: For this retrospective analysis, four patients (1M/3F) diagnosed with rectal cancer were included...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048067/su-f-t-36-dosimetric-comparison-of-point-based-vs-target-based-prescription-for-intracavitary-brachytherapy-in-cancer-of-the-cervix
#5
M Ashenafi, D McDonald, J Peng, C Mart, N Koch, L Cooper, K Vanek
PURPOSE: Improved patient imaging used for planning the treatment of cervical cancer with Tandem and Ovoid (T&O) Intracavitary high-dose-rate brachytherapy (HDR) now allows for 3D delineation of target volumes and organs-at-risk. However, historical data relies on the conventional point A-based planning technique. A comparative dosimetric study was performed by generating both target-based (TBP) and point-based (PBP) plans for ten clinical patients. METHODS: Treatment plans created using Elekta Oncentra v...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047948/su-f-t-203-high-dose-definitive-proton-therapy-with-integrated-boost-to-hypoxic-subvolumes-determined-by-18f-fluoromisonidazole-fmiso-pet-ct-for-patients-with-recurrent-chordomas-using-intensity-modulated-proton-therapy-impt
#6
S Yan, G Broussard, K De, Amorim Bernstein, Y Wang
PURPOSE: Recurrent chordomas are difficult to control locally. This dosimetric study investigates the feasibility of dose escalation to hypoxic regions, visualized on FMISO-PET, while respecting the dose constraints to the neighboring normal tissues/organs. We propose to deliver a higher dose to the areas of hypoxia (84.5Gy) using IMPT with the goal of improving local control. METHODS: We currently have four patients with hypoxic subvolumes (HSV) greater than 10cc from the FMISO-PET image...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047374/su-f-t-55-reproducibility-of-interstitial-hdr-brachytherapy-plans
#7
S Lee, R Ellis, B Traughber, T Podder
PURPOSE: Treating gynecological cancers with interstitial high-dose-rate (HDR) brachytherapy requires precise reconstruction of catheter positions to obtain accurate dosimetric plans. In this study, we investigated the degree of reproducibility of dosimetric plans for Syed HDR brachytherapy. METHODS: We randomly selected five patients having cervix-vaginal cancer who were recently treated in our clinic with interstitial HDR brachytherapy with a prescription dose of 25-30 Gy in five fractions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046477/we-de-201-03-combined-use-of-192ir-60co-and-169yb-sources-with-the-novel-direction-modulated-brachytherapy-tandem-applicator-for-high-dose-rate-brachytherapy-planning-of-cervical-cancer
#8
H Safigholi, D Han, S Mashouf, A Soliman, A S Meigooni, A Owrangi, W Y Song
PURPOSE: To evaluate the improvement in plan quality when various combinations of 192Ir, 60Co, and 169Yb sources are used in combination with a novel direction modulated brachytherapy (DMBT) tandem applicator for high dose rate brachytherapy of cervical cancer. METHODS: The proposed DMBT tandem applicator is designed for image-guided adaptive brachytherapy (IGABT), especially MRI, of cervical cancer. It has 6 peripheral holes of 1.3-mm width, grooved along a 5.4-mm diameter nonmagnetic tungsten alloy rod of density 18...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27992058/an-mri-compatible-patient-rotation-system-design-construction-and-first-organ-deformation-results
#9
Brendan Whelan, Gary Liney, Jason A Dowling, Robba Rai, Lois Holloway, Leigh McGarvie, Ilana Feain, Megan Berry, Michael Barton, Rob Wilkins, Paul Keall
PURPOSE: Conventionally in radiotherapy, a very heavy beam forming apparatus (gantry) is rotated around a patient. From a mechanical perspective, a more elegant approach is to rotate the patient within a stationary beam. Key obstacles to this approach are patient tolerance and anatomical deformation. Very little information on either aspect is available in the literature. The purpose of this work was therefore to design and test an MRI compatible patient rotation system such that the feasibility of a patient rotation workflow could be tested...
December 19, 2016: Medical Physics
https://www.readbyqxmd.com/read/27984747/imaging-diagnostics-in-ovarian-cancer-magnetic-resonance-imaging-and-a-scoring-system-guiding-choice-of-primary-treatment
#10
Sigrid M Kasper, Margit Dueholm, Edvard Marinovskij, Jan Blaakær
OBJECTIVE: To analyze the ability of magnetic resonance imaging (MRI) and systematic evaluation at surgery to predict optimal cytoreduction in primary advanced ovarian cancer and to develop a preoperative scoring system for cancer staging. STUDY DESIGN: Preoperative MRI and standard laparotomy were performed in 99 women with either ovarian or primary peritoneal cancer. Using univariate and multivariate logistic regression analysis of a systematic description of the tumor in nine abdominal compartments obtained by MRI and during surgery plus clinical parameters, a scoring system was designed that predicted non-optimal cytoreduction...
October 29, 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/27908678/avoidance-of-late-rectal-toxicity-after-high-dose-rate-brachytherapy-boost-treatment-for-prostate-cancer
#11
Borut Kragelj, Jernej Zlatic, Lijana Zaletel-Kragelj
PURPOSE: To elucidate potential risk factors important for the appearance of late rectal toxicity (LRT) after high-dose-rate boost treatment (HDRBT) of prostate cancer and to validate the predictive value of the minimal dose to the most exposed 2 cc of rectum received with HDRBT (D2ccrect). METHODS AND MATERIALS: The study of LRT, defined as relative deterioration of defecation problems (RDDP) (stool frequency, pain, rectal bleeding, fecal urgency, and incontinence) during follow-up period, was carried out on 88 patients, consecutively treated from October 2006 through April 2011 with HDRBT of 3 × 6-7 Gy to 50-50...
November 28, 2016: Brachytherapy
https://www.readbyqxmd.com/read/27898453/resolution-of-rectal-prolapse-by-vaginal-reconstruction
#12
Hemikaa Devakumar, Neeraja Chandrasekaran, Alexandriah Alas, Laura Martin, G Willy Davila, Eric Hurtado
BACKGROUND: Rectal prolapse is a disorder of the pelvic floor in which the layers of the rectal mucosa protrude outward through the anus. Surgical repair is the mainstay of treatment. Options include intra-abdominal procedures such as rectopexy and perineal procedures such as the Delorme and Altemeier perineal rectosigmoidectomy. Rectal and vaginal prolapse can often coexist. However, to our knowledge, there are no reported cases of rectal prolapse resolved by the repair of a compressive enterocele abutting the anterior rectal wall through a vaginal approach alone...
January 2017: Female Pelvic Medicine & Reconstructive Surgery
https://www.readbyqxmd.com/read/27895682/development-and-clinical-implementation-of-a-new-template-for-mri-based-intracavitary-interstitial-gynecologic-brachytherapy-for-locally-advanced-cervical-cancer-from-ct-based-mupit-to-the-mri-compatible-template-benidorm-ten-years-of-experience
#13
Silvia Rodríguez Villalba, Jose Richart Sancho, Antonio Otal Palacín, Jose Perez-Calatayud, Manuel Santos Ortega
PURPOSE: To study outcome and toxicity in 59 patients with locally advanced cervix carcinoma treated with computed tomography (CT)-based Martinez universal perineal interstitial template (MUPIT) and the new magnetic resonance imaging (MRI)-compatible template Benidorm (TB). MATERIAL AND METHODS: From December 2005 to October 2015, we retrospectively analyzed 34 patients treated with MUPIT and 25 treated with the TB. Six 4 Gy fractions were prescribed to the clinical target volume (CTV) combined with external beam radiotherapy (EBRT)...
October 2016: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/27876378/toxicities-and-dose-volume-histogram-parameters-of-mri-based-brachytherapy-for-cervical-cancer
#14
Youngkyong Kim, Yeon-Joo Kim, Joo-Young Kim, Young Kyung Lim, Chiyoung Jeong, Jonghwi Jeong, Meyoung Kim, Myong Cheol Lim, Sang-Soo Seo, Sang-Yoon Park
PURPOSE: To analyze the toxicities and dose-volume histogram parameters of external-beam and magnetic resonance imaging-based intracavitary brachytherapy in cervical cancer patients. METHODS AND MATERIALS: Acute and late toxicities were assessed in 135 patients divided into four groups: group 1, grade 0; group 2, grades 1-4; group 3, grades 0-1; and group 4, grades 2-4. The doses at the International Commission on Radiation Units and Measurements (DICRU) and minimum doses to the most exposed 0...
November 18, 2016: Brachytherapy
https://www.readbyqxmd.com/read/27872117/protocol-for-a-multicentre-randomised-feasibility-trial-evaluating-early-surgery-alone-in-low-rectal-cancer-sailor
#15
Dean A Harris, Kymberley Thorne, Hayley Hutchings, Saiful Islam, Gail Holland, Olivia Hatcher, Sarah Gwynne, Ian Jenkins, Peter Coyne, Michael Duff, Melanie Feldman, Des C Winter, Simon Gollins, Phil Quirke, Nick West, Gina Brown, Deborah Fitzsimmons, Alan Brown, John Beynon
INTRODUCTION: There are 11 500 rectal cancers diagnosed annually in the UK. Although surgery remains the primary treatment, there is evidence that preoperative radiotherapy (RT) improves local recurrence rates. High-quality surgery in rectal cancer is equally important in minimising local recurrence. Advances in MRI-guided prediction of resection margin status and improvements in abdominoperineal excision of the rectum (APER) technique supports a reassessment of the contribution of preoperative RT...
November 21, 2016: BMJ Open
https://www.readbyqxmd.com/read/27865145/rectal-gastrointestinal-stromal-tumor-with-metastasis-to-the-penis-case-report-and-review-of-literature
#16
Jacob Carlson, Wilson Alobuia, Jason Mizell
We report the case of a 51-year-old gentleman with previously diagnosed gastrointestinal stromal tumor (GIST) of the rectum with metastasis to the penis. The patient underwent abdominoperineal resection of the primary tumor with negative margins and completed a three-year course of imatinib mesylate (Gleevec). Forty months after resection of his rectal tumor, the patient presented to his urologist with worsening testicular pain, mild lower urinary tract obstructive symptoms, and nocturia. A pelvic MRI revealed the presence of an ill-defined mass in the right perineum extending from the base of the penis to the penoscrotal junction...
2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27860404/perineal-alveolar-soft-part-sarcoma-treated-by-laparoscopy-assisted-total-pelvic-exenteration-combined-with-pubic-resection
#17
Toshisada Aiba, Keisuke Uehara, Satoshi Tsukushi, Yasushi Yoshino, Tomoki Ebata, Yukihiro Yokoyama, Tsuyoshi Igami, Gen Sugawara, Masato Nagino
A 20-year-old woman with a perineal alveolar soft part sarcoma was referred to our hospital. MRI showed that an irregular oval tumor occupied the perineum. The tumor was contiguous to the vagina, rectum, levator muscle, and pubis and was diagnosed as alveolar soft part sarcoma by transvaginal biopsy. Laparoscopy-assisted total pelvic exenteration combined with a pubic resection was performed, and an R0 resection with a wide margin was achieved. It is well known that only R0 resection improves the outcome of patients with localized alveolar soft part sarcoma...
November 10, 2016: Asian Journal of Endoscopic Surgery
https://www.readbyqxmd.com/read/27816539/feasibility-study-of-toxicity-outcomes-using-gec-estro-contouring-guidelines-on-ct-based-instead-of-mri-based-planning-in-locally-advanced-cervical-cancer-patients
#18
Vicky Koh, Bok Ai Choo, Khai Mun Lee, Teng Hwee Tan, Jen Hui Jeffrey Low, Soon Yau Joseph Ng, Arunachalam Ilancheran, Liang Shen, Johann Tang
PURPOSE: To report late rectal and bladder toxicity outcomes of a CT-based image-guided brachytherapy (IGBT) technique for treatment of cervical cancer. METHODS AND MATERIALS: Between 2008 and 2014, 95 women with International Federation of Gynecology and Obstetrics stage IB to IVA cervical carcinoma treated with definitive concurrent cisplatin-based chemotherapy and external beam radiation therapy 50.4 Gy in 28 fractions followed by planned prescription dose of 7 Gy × 4 fractions of high-dose-rate IGBT was retrospectively reviewed...
November 2, 2016: Brachytherapy
https://www.readbyqxmd.com/read/27814981/hemi-gland-focal-low-dose-rate-prostate-brachytherapy-an-analysis-of-dosimetric-outcomes
#19
Robert Laing, Adrian Franklin, Jennifer Uribe, Alex Horton, Santiago Uribe-Lewis, Stephen Langley
BACKGROUND AND PURPOSE: Advances in magnetic resonance imaging (MRI) and prostate sampling enable early identification of men with low to intermediate risk prostate cancer who are candidates for focal therapies that minimise side effects. We report dosimetry data from a pilot study evaluating the effectiveness of hemi-gland low dose rate (HG-LDR) brachytherapy as a focal therapy approach to control unilateral localised disease. MATERIAL AND METHODS: Twenty-two men underwent HG-LDR brachytherapy...
November 2016: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/27745996/neurovascular-bundle-sparing-radiotherapy-for-prostate-cancer-using-mri-ct-registration-a-dosimetric-feasibility-study
#20
R J Cassidy, X Yang, T Liu, M Thomas, S G Nour, A B Jani
PURPOSE: Sexual dysfunction after radiotherapy for prostate cancer remains an important late adverse toxicity. The neurovascular bundles (NVB) that lie posterolaterally to the prostate are typically spared during prostatectomy, but in traditional radiotherapy planning they are not contoured as an organ-at-risk with dose constraints. Our goal was to determine the dosimetric feasibility of "NVB-sparing" prostate radiotherapy while still delivering adequate dose to the prostate. METHODS: Twenty-five consecutive patients with prostate cancer (with no extraprostatic disease on pelvic magnetic resonance imaging [MRI]) who that were treated with external beam radiotherapy, with the same primary planning target volume margins, to a dose of 79...
January 2016: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
keyword
keyword
66804
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"