keyword
MENU ▼
Read by QxMD icon Read
search

Mri rectum

keyword
https://www.readbyqxmd.com/read/29784739/management-of-locoregional-rectal-cancer
#1
Christopher G Willett
The NCCN Guidelines for Rectal Cancer are now more closely aligned with those for colon cancer. A new MRI-based definition of the rectum has been included and the use of MRI in staging has been elevated in importance. There is a new emphasis on neoadjuvant therapy, especially the concurrent use of chemotherapy and radiotherapy. One of the biggest changes is more acceptance of an observational approach-"watch and wait, nonoperative management"-for select patients experiencing a complete clinical response with no evidence of residual disease after neoadjuvant therapy...
May 2018: Journal of the National Comprehensive Cancer Network: JNCCN
https://www.readbyqxmd.com/read/29773331/novel-use-of-viewray-mri-guidance-for-high-dose-rate-brachytherapy-in-the-treatment-of-cervical-cancer
#2
Huaising C Ko, Jessie Y Huang, Jessica R Miller, Rupak K Das, Charles R Wallace, Anna-Maria A De Costa, David M Francis, Margaret R Straub, Bethany M Anderson, Kristin A Bradley
PURPOSE: To characterize image quality and feasibility of using ViewRay MRI (VR)-guided brachytherapy planning for cervical cancer. METHODS AND MATERIALS: Cervical cancer patients receiving intracavitary brachytherapy with tandem and ovoids, planned using 0.35T VR MRI at our institution, were included in this series. The high-risk clinical target volume (HR-CTV), visible gross tumor volume, bladder, sigmoid, bowel, and rectum contours for each fraction of brachytherapy were evaluated for dosimetric parameters...
May 14, 2018: Brachytherapy
https://www.readbyqxmd.com/read/29764769/comparison-of-computed-tomography-with-magnetic-resonance-imaging-for-imaging-based-clinical-target-volume-contours-in-cervical-cancer-brachytherapy
#3
Agnieszka Zolciak-Siwinska, Adam Kowalczyk, Katarzyna Sikorska, Michal Bijok, Wojciech Michalski, Ewelina Gruszczynska
PURPOSE: To compare CT- and MRI-based brachytherapy (BT) target volumes for patients with advanced cervical cancer so as to identify those who benefit most from MRI-based planning. We also studied how the natural mobility of the organ at risks (OARs) affects the given doses. METHODS AND MATERIALS: Subjects were 60 patients with International Federation of Gynecology and Obstetrics (FIGO) Stage IB-IVA cervical cancer. The CT high-risk clinical target volume (HR-CTV) was first delineated, then the MRI HR-CTV, with volume discrepancies calculated by subtraction...
May 12, 2018: Brachytherapy
https://www.readbyqxmd.com/read/29754871/dynamic-contrast-enhanced-mr-imaging-of-the-rectum-correlations-between-single-section-and-whole-tumor-histogram-analyses
#4
M H Choi, S N Oh, G E Park, D-M Yeo, S E Jung
PURPOSE: To evaluate the interobserver and intermethod correlations of histogram metrics of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) parameters acquired by multiple readers using the single-section and whole-tumor volume methods. MATERIALS AND METHODS: Four DCE parameters (Ktrans , Kep , Ve , Vp ) were evaluated in 45 patients (31 men and 14 women; mean age, 61±11 years [range, 29-83 years]) with locally advanced rectal cancer using pre-chemoradiotherapy (CRT) MRI...
May 10, 2018: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/29716617/focal-dose-escalation-for-prostate-cancer-using-68-ga-hbed-cc-psma-pet-ct-and-mri-a-planning-study-based-on-histology-reference
#5
Constantinos Zamboglou, Benedikt Thomann, Khodor Koubar, Peter Bronsert, Tobias Krauss, Hans C Rischke, Ilias Sachpazidis, Vanessa Drendel, Nasr Salman, Kathrin Reichel, Cordula A Jilg, Martin Werner, Philipp T Meyer, Michael Bock, Dimos Baltas, Anca L Grosu
BACKGROUND: Focal radiation therapy has gained of interest in treatment of patients with primary prostate cancer (PCa). The question of how to define the intraprostatic boost volume is still open. Previous studies showed that multiparametric MRI (mpMRI) or PSMA PET alone could be used for boost volume definition. However, other studies proposed that the combined usage of both has the highest sensitivity in detection of intraprostatic lesions. The aim of this study was to demonstrate the feasibility and to evaluate the tumour control probability (TCP) and normal tissue complication probability (NTCP) of radiation therapy dose painting using 68 Ga-HBED-CC PSMA PET/CT, mpMRI or the combination of both in primary PCa...
May 2, 2018: Radiation Oncology
https://www.readbyqxmd.com/read/29663417/technical-note-a-deep-learning-based-auto-segmentation-of-rectal-tumors-in-mr-images
#6
Jiazhou Wang, Jiayu Lu, Gan Qin, Lijun Shen, Yiqun Sun, Hongmei Ying, Zhen Zhang, Weigang Hu
PURPOSE: Manual contouring of gross tumor volumes (GTV) is a crucial and time-consuming process in rectum cancer radiotherapy. This study aims to develop a simple deep learning based auto segmentation algorithm to segment rectal tumors on T2 weighted MR images. MATERIAL AND METHODS: MRI scans (3T, T2-weighted) of 93 patients with locally advanced (cT3-4 and/or cN1-2) rectal cancer treated with neoadjuvant chemoradiotherapy followed by surgery were enrolled in this study...
April 16, 2018: Medical Physics
https://www.readbyqxmd.com/read/29662622/quantitative-parameters-in-dynamic-contrast-enhanced-magnetic-resonance-imaging-for-the-detection-and-characterization-of-prostate-cancer
#7
Cheng Wei, Bowen Jin, Magdalena Szewczyk-Bieda, Stephen Gandy, Stephen Lang, Yilong Zhang, Zhihong Huang, Ghulam Nabi
Objectives: to assess the diagnostic accuracy of quantitative parameters of DCE-MRI in multi-parametric MRI (mpMRI) in comparison to the histopathology (including Gleason grade) of prostate cancer. Patients and methods: 150 men with suspected prostate cancer (abnormal digital rectum examination and or elevated prostate-specific antigen) received pre-biopsy 3T mpMRI and were recruited into peer-reviewed, protocol-based prospective study. The DCE-MRI quantitative parameters ( Ktrans (influx transfer constant) and kep (efflux rate constant)) of the cancerous and normal areas were recorded using four different kinetic models employing Olea Sphere (Olea Medical, La Ciotat, France)...
March 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29615067/does-setup-on-rectal-wall-improve-rectal-cancer-boost-radiotherapy
#8
Jean-Paul J E Kleijnen, Bram van Asselen, Martijn Intven, Johannes P M Burbach, Marielle E P Philippens, Jan J W Lagendijk, Bas W Raaymakers
BACKGROUND: Rectal cancer patients that show a pathological complete response (pCR) after neo-adjuvant chemo-radiotherapy, have better prognosis. To increase pCR rates several studies escalate the tumor irradiation dose. However, due to lacking tumor contrast on online imaging techniques, no direct tumor setup can be performed and large boost margins are needed to ensure tumor coverage. The purpose of this study was to evaluate the feasibility of performing a setup on rectal wall for rectal cancer boost radiotherapy, thereby using rectal wall nearby the tumor as tumor position surrogate...
April 4, 2018: Radiation Oncology
https://www.readbyqxmd.com/read/29605125/mri-artefact-in-the-rectum-caused-by-ingested-orthodontic-brackets
#9
M M Almuqbel, G J Leeper, J F Petelo, T J Page, T R Melzer
Magnetic susceptibility artefacts, caused by metallic objects, present a challenge in magnetic resonance imaging (MRI). In this case, MRI showed metal-induced artefact in the rectum of a 14-year-old girl who presented with pain in the coccyx after a snowboarding accident. Previous radiographs showed no evidence of metal in the area. After the identification of the artefact and upon discussion with the patient, she disclosed that two orthodontic brackets had been swallowed two days prior to the MRI examination, likely the source of artefact...
May 2018: Radiography
https://www.readbyqxmd.com/read/29545442/unusual-case-of-a-rectal-tumour
#10
Maryam Alfa-Wali, Samantha Muktar, Dimitrios Pissas, Ceri Slater
A 48-year-old man presented as an emergency with a 3-week history of rectal bleeding. Examination of his rectum revealed a circumferential tumour, 2 cm from the anal verge. An MRI scan reported a locally infiltrative mid-lower rectal tumour staged as T3d/T4 N2 MX. A colonoscopy revealed appearances of severe proctitis and biopsies did not show any evidence of dysplasia or malignancy. The patient was discussed at the regional colorectal cancer multidisciplinary team meeting with a management plan for neoadjuvant chemoradiotherapy following repeat biopsies, which were again negative for malignancy...
March 15, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29535533/comparison-between-multi-slice-spiral-ct-and-magnetic-resonance-imaging-in-the-diagnosis-of-peritoneal-metastasis-in-primary-ovarian-carcinoma
#11
Hong-Lei Guo, Ling He, Yan-Cui Zhu, Kun Wu, Feng Yuan
The advent of disease evaluation by means of multi-slice spiral computed tomography (MSCT) and magnetic resonance imaging (MRI) represents a continually emerging role in the evaluation of various diseases; however, its role is yet to be adequately defined. Thus, the aim of the study was to compare the diagnostic value of MSCT and MRI in the diagnosis of peritoneal metastasis in primary ovarian carcinoma. Between January 2013 and December 2015, MSCT or MRI data were collected from 42 patients who had been previously diagnosed with peritoneal metastasis of ovarian carcinoma at the First Affiliated Hospital of Kunming Medical University...
2018: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29531795/growth-of-the-colon-and-rectum-throughout-gestation-evaluation-with-fetal-mri
#12
Michalle Soudack Ben-Nun, Aviva Ben-Shlush, Lisa Raviv Zilka
Background: Congenital abnormalities of the gastrointestinal tract are increasingly being evaluated by prenatal magnetic resonance imaging (MRI). However, there is a paucity of reports describing the normal quantitative development of the fetal colon and rectum on MRI. Purpose: To provide growth curves of the MRI estimated diameter of the fetal colon and rectum as a function of gestational age. Material and Methods: This is a retrospective review of 191 singleton fetal MRI studies at 25-39 weeks of gestation...
March 2018: Acta Radiologica Open
https://www.readbyqxmd.com/read/29525514/new-approach-of-ultra-focal-brachytherapy-for-low-and-intermediate-risk-prostate-cancer-with-custom-linked-i-125-seeds-a-feasibility-study-of-optimal-dose-coverage
#13
Thomas Brun, Jean-Marc Bachaud, Pierre Graff-Cailleaud, Bernard Malavaud, Daniel Portalez, Christian Popotte, Richard Aziza, Amélie Lusque, Thomas Filleron, Soléakhéna Ken
PURPOSE: To present the feasibility study of optimal dose coverage in ultra-focal brachytherapy (UFB) with multiparametric MRI for low- and intermediate-risk prostate cancer. METHODS AND MATERIALS: UFB provisional dose plans for small target volumes (<7 cc) were calculated on a prostate training phantom to optimize the seeds number and strength. Clinical UFB consisted in a contour-based nonrigid registration (MRI/Ultrasound) to implant a fiducial marker at the location of the tumor focus...
March 7, 2018: Brachytherapy
https://www.readbyqxmd.com/read/29518234/comparison-of-dosimetric-parameters-in-the-treatment-planning-of-magnetic-resonance-imaging-based-intracavitary-image-guided-adaptive-brachytherapy-with-and-without-optimization-using-the-central-shielding-technique
#14
Ryo Nishikawa, Kenji Yoshida, Yasuhiko Ebina, Mayumi Omoteda, Daisuke Miyawaki, Takeaki Ishihara, Yasuo Ejima, Hiroaki Akasaka, Hitoaki Satoh, Katsusuke Kyotani, Satoru Takahashi, Ryohei Sasaki
This study aimed to compare dosimetric parameters between non-optimized and optimized treatment planning (NOP and OP, respectively) of magnetic resonance imaging (MRI) -based intracavitary (IC) image-guided adaptive brachytherapy (IGABT) using the central shielding (CS) technique for cervical cancer. Fifty-three patients treated with external beam radiotherapy using CS and MRI-based IGABT with the IC approach alone were evaluated. The total high-risk clinical target volume (HR-CTV) D90 was aimed at >70 Gy equivalent dose in 2 Gy fractions (EQD2)...
March 6, 2018: Journal of Radiation Research
https://www.readbyqxmd.com/read/29496279/estro-acrop-consensus-guideline-on-ct-and-mri-based-target-volume-delineation-for-primary-radiation-therapy-of-localized-prostate-cancer
#15
Carl Salembier, Geert Villeirs, Berardino De Bari, Peter Hoskin, Bradley R Pieters, Marco Van Vulpen, Vincent Khoo, Ann Henry, Alberto Bossi, Gert De Meerleer, Valérie Fonteyne
BACKGROUND AND PURPOSE: Delineation of clinical target volumes (CTVs) remains a weak link in radiation therapy (RT), and large inter-observer variation is seen. Guidelines for target and organs at risk delineation for prostate cancer in the primary setting are scarce. The aim was to develop a delineation guideline obtained by consensus between a broad European group of radiation oncologists. MATERIAL AND METHODS: An ESTRO contouring consensus panel consisting of leading radiation oncologists and one radiologist with known subspecialty expertise in prostate cancer was asked to delineate the prostate, seminal vesicles and rectum on co-registered CT and MRI scans...
April 2018: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29482686/abdominal-supernumerary-testis-complicated-by-yolk-sac-tumor
#16
Safdar Shah, Muhammad Danial Ali Shah, Abeer Fatima, Fawad Nasrullah, Wajid Ali, Irfan Ahmed Gorya
We describe a case of a 26-year man with complaints of suprapubic pain and burning micturition for two weeks and intermittent hematuria for two months. On physical examination, there was palpable mobile pelvic mass measuring 10x10 cm. Both testes were palpable in the scrotum. CT scan abdomen revealed well-defined, soft tissue mass, about 11x10 cm between rectum and urinary bladder. Mass showed internal necrotic changes and enhancement along the walls. No calcification was seen. Exploratory laparotomy was done...
March 2018: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/29477926/colorectal-intussusception-secondary-to-primary-rectal-melanoma-a-novel-case-report
#17
Colin McQuade, Peadar S Waters, Ciara O'Brien, Stephen Crowther, William Torreggiani, Dara O Kavanagh
INTRODUCTION: Intussusception in adults is a rare condition, accounting for just 5% of all cases. Approximately 50% of cases of large intestine intussusception occur due to a malignant neoplasm. We present here a novel case report of colo-rectal intussusception arising secondary to a primary rectal melanoma. PRESENTATION OF CASE: We present the case of an 85 year-old patient, who underwent a colonoscopy for investigation of weight loss and altered bowel habit. At colonoscopy, a pigmented polypoid mass was visualised in the upper third of the rectum...
2018: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29409326/five-year-outcome-after-pelvic-floor-reconstructive-surgery-evaluation-using-dynamic-magnetic-resonance-imaging-compared-to-clinical-examination-and-quality-of-life-questionnaire
#18
Céline D Alt, Laura Benner, Theresa Mokry, Florian Lenz, Peter Hallscheidt, Christof Sohn, Hans-Ulrich Kauczor, Kerstin A Brocker
Background Dynamic magnetic resonance imaging (dMRI) captures the entire pelvis during Valsalva maneuver and helps diagnosing pelvic floor changes after reconstructive surgery. Purpose To evaluate therapeutic outcome five years after reconstructive surgery using clinical examination, dMRI, and quality-of-life (QOL) questionnaire. Material and Methods Clinical examination, dMRI, and QOL questionnaire were conducted before surgery and in the follow-ups at 12 weeks, one year, and five years in women with pelvic organ prolapse (POP) stage ≥2...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29394832/-a-case-of-pararectal-epidermoid-cyst-removed-by-sacral-approach
#19
Atsuhiro Imai, Kohei Murata, Atsushi Naito, Yoshinori Kagawa, Kenji Kawai, Takuya Sakamoto, Kohei Murakami, Yoshiteru Katsura, Yoshiaki Ohmura, Toru Masuzawa, Atsushi Takeno, Shinichi Nakatsuka, Hiroshi Takeda, Takeshi Kato, Shigeyuki Tamura
A 30-year-old woman was admittedto the hospital because of fecal occult bloodpositivity . Endoscopic colonoscopy indicated pressure on the right side of the rectum from the wall. Abdominal contrast CT and pelvic MRI revealed a cystic lesion with a maximum diameter of 5 cm on the pre-coccyx andthe right side of rectum. There was no continuity between the tumor andthe uterus/ovary. We diagnoseda pararectal tumor andremovedit via a sacral approach. The cyst was diagnosed as an epidermoid cyst. She was discharged on the 5th postoperative day...
November 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29394752/-curative-resection-for-metastatic-lower-rectal-tumor-from-ovarian-cancer-report-of-a-case
#20
Shu Okamura, Hozumi Noda, Kazuhito Ohishi, Tomohiro Kitahara, Kohei Murata, Takayuki Minoji, Rie Hamano, Tetsu Yanagisawa, Nariaki Fukuchi, Chikara Ebisui, Hideoki Yokouchi, Takamichi Nishizaki, Masakatsu Kinuta
We here report the case of a 56-year-old female patient who underwent curative resection for right ovarian cancer with intraperitoneal dissemination and liver metastases. She received following adjuvant chemotherapy, and had been visited hospital for regular follow-up since then. One and half a year after surgery, blood examination showed increasing value of CA125. Contrast-enhanced CT scan revealed a tumor whose long diameter was 5 cm at front side of lower rectum. Following MRI and PET-CT examinations indicated the pelvic tumor as recurrence of ovarian cancer, so that laparotomy was carried out...
November 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
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"