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Constraint therapy

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https://www.readbyqxmd.com/read/29148570/robust-optimization-in-impt-using-quadratic-objective-functions-to-account-for-the-minimum-mu-constraint
#1
Jie Shan, Yu An, Martin Bues, Steven E Schild, Wei Liu
PURPOSE: Currently, in clinical practice of intensity-modulated proton therapy (IMPT), the influence of the minimum monitor unit (MU) constraint is taken into account through post-processing after the optimization is completed. This may degrade the plan quality and plan robustness. This study aims to mitigate the impact of the minimum MU constraint directly during the plan robust optimization. METHODS AND MATERIALS: Cao et al. have demonstrated a two-stage method to account for the minimum MU constraint using linear programming without the impact of uncertainties considered...
November 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/29145321/acupuncture-and-constraint-induced-movement-therapy-for-a-patient-with-chronic-stroke-one-year-follow-up-case-report
#2
Yuanyuan Jin, Xiaoqing Jin, Yidan Chen, Jianfang Zhu
RATIONALE: Spasticity is a widespread problem in chronic stroke. To date, no study has reported the long-term (up to 1 year) outcomes of acupuncture in combination with constraint-induced movement therapy in patients with chronic stroke. This report describes the successful addition of acupuncture on spasticity and arm function in a patient with chronic stroke and arm paresis. PATIENT CONCERNS: At screening, the patient was unable to voluntarily extend her interphalangeal or metacarpophalangeal joints beyond the 10 degrees required for constraint-induced movement therapy...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29141779/five-field-imrt-class-solutions-and-dosimetric-planning-guidelines-for-implementing-accelerated-partial-breast-irradiation
#3
Sarah Quirk, Petra Grendarova, Michael Roumeliotis
PURPOSE: A comprehensive set of planning guidelines was developed to aid in achieving reproducible dosimetric results for external beam accelerated partial breast irradiation (APBI). The methodology for the development of class solutions for dosimetric planning of the APBI technique, including dose constraint recommendations, is presented for target coverage and conformity as well as normal tissues. METHODS AND MATERIALS: A conservative patient setup was simulated on a linear accelerator, and a comprehensive arrangement of gantry and couch angles was measured for clearance...
September 28, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/29132970/at-home-and-in-group-delivery-of-constraint-induced-movement-therapy-in-children-with-hemiparesis-a-systematic-review
#4
REVIEW
Emilie Durand, Pascale Plante, Andrey-Anne Pelletier, Johanie Rondeau, Frédérique Simard, Julien Voisin
BACKGROUND: Constraint-induced movement therapy (CIMT) is increasingly recognized as an effective therapy for children with hemiparesis. However, the effectiveness of CIMT outside the standard rehabilitation protocol in clinical settings is less known. The aim of this systematic review was to investigate the effectiveness of CIMT conducted at home or in a group. METHODS: We searched CINAHL, PubMed and ScienceDirect in August 2017 to select articles of studies investigating the impact of CIMT performed at home and in a group on affected upper-limb ability, occupational performance, and quality of life of children...
November 10, 2017: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29132800/fetal-bone-marrow-homing-of-donor-mesenchymal-stem-cells-after-transamniotic-stem-cell-therapy-trascet
#5
Hester F Shieh, Azra Ahmed, Sarah A Tracy, David Zurakowski, Dario O Fauza
PURPOSE: Donor cell engraftment patterns following transamniotic stem cell therapy (TRASCET) with amniotic fluid mesenchymal stem cells (afMSCs) are incompatible with solely direct amniotic seeding. We sought to determine whether fetal bone marrow is a component of such engraftment and to examine the chronology of afMSC placental trafficking. METHODS: Two groups of Sprague-Dawley rat fetuses received volume-matched intraamniotic injections on gestational day 17 (E17; term E22): either afMSCs labeled with a luciferase reporter gene or luciferase protein alone...
October 12, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/29130404/differences-in-neural-pathways-are-related-to-the-short-or-long-term-benefits-of-constraint-induced-movement-therapy-in-patients-with-chronic-stroke-and-hemiparesis-a-pilot-cohort-study
#6
Takashi Takebayashi, Kohei Marumoto, Kayoko Takahashi, Kazuhisa Domen
Background No previous studies have determined how the post-stroke integrity of non-corticospinal neural pathways relates to the efficacy of constraint-induced movement therapy (CIMT). Objectives We aimed to clarify the relationship between several non-corticospinal neural pathway integrities and the short- and long-term benefits of CIMT. Methods This was a pilot cohort study (UMIN registration number: R00027136UMIN000023566), for which we enrolled 13 patients with chronic stroke and hemiparesis who had undergone CIMT...
November 13, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/29125239/hippocampal-sparing-approach-in-fractionated-stereotactic-brain-vmat-radio-therapy-a-retrospective-feasibility-analysis
#7
Maria Daniela Falco, Stefano Giancaterino, Marco D'Andrea, Ramon Gimenez De Lorenzo, Marianna Trignani, Luciana Caravatta, Clelia Di Carlo, Saide Di Biase, Albina Allajbej, Domenico Genovesi
Volumetric Modulated Arc Therapy (VMAT) techniques for fractioned stereotactic brain radiotherapy (FSBRT) can achieve highly conformal dose distribution to intracranial lesions. However, they can potentially increase the dose to hippocampus (H) causing neurocognitive toxicity during the first four months after irradiation. The purpose of this study was to assess the feasibility of hippocampal-sparing (HS) treatment plans in 22 patients with brain metastasis treated with VMAT technique. Firstly, we retrospectively analyzed hippocampal doses in all 22 VMAT original (not hippocampal-sparing, NHS) plans...
November 10, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29125035/cone-beam-computed-tomography-cbct-for-adaptive-image-guided-head-and-neck-radiation-therapy
#8
Christian A Hvid, Ulrik V Elstrøm, Kenneth Jensen, Cai Grau
BACKGROUND: Adaptive (ART) and image guided radiation therapy (IGRT) can improve target coverage and reduce unnecessary irradiation of organs at risk (OAR). The purpose of this study is to report the results of using mid-course imaging and a novel workflow with cone-beam computed tomography (CBCT) surveillance of dose to OAR to trigger adaptive replanning in head and neck radiotherapy. MATERIAL AND METHODS: Impact of radiation therapist (RTT) managed match protocol and mid-course imaging was assessed in two cohorts of consecutive patients receiving RT to the head and neck region, using computed tomography (CT) and CBCT-based dose verification respectively...
November 10, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/29123197/a-microdevice-platform-recapitulating-hypoxic-tumor-microenvironments
#9
Yuta Ando, Hoang P Ta, Daniel P Yen, Sang-Sin Lee, Sneha Raola, Keyue Shen
Hypoxia plays a central role in cancer progression and resistance to therapy. We have engineered a microdevice platform to recapitulate the intratumor oxygen gradients that drive the heterogeneous hypoxic landscapes in solid tumors. Our design features a "tumor section"-like culture by incorporating a cell layer between two diffusion barriers, where an oxygen gradient is established by cellular metabolism and physical constraints. We confirmed the oxygen gradient by numerical simulation and imaging-based oxygen sensor measurement...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29120541/-infection-of-chronic-wounds-in-elderly-patients
#10
Raphaël Masson, Hubert Vuagnat, Ilker Uçkay, Laurence Toutous-Trellu, Virginie Prendki
Chronic wounds infection in the elderly patients presents the risk of functional decompensation, or irreversible worsening of a wound. The diversity of clinical situations, the absence of data from clinical trials in the literature and a certain fatalism in view of the poor prognosis of these conditions should not be allowed to delay the early preparation of a patient-centred care plan (aiming at complete scarring, remission or symptomatic relief). Diagnostic and therapeutic strategies must be flexible, to take account not only of functional issues, constraints and special features relating to the patient but also of the resources and technical means available...
November 8, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/29116473/early-rehabilitation-after-stroke-a-narrative-review
#11
REVIEW
Elisheva R Coleman, Rohitha Moudgal, Kathryn Lang, Hyacinth I Hyacinth, Oluwole O Awosika, Brett M Kissela, Wuwei Feng
PURPOSE OF REVIEW: Despite current rehabilitative strategies, stroke remains a leading cause of disability in the USA. There is a window of enhanced neuroplasticity early after stroke, during which the brain's dynamic response to injury is heightened and rehabilitation might be particularly effective. This review summarizes the evidence of the existence of this plastic window, and the evidence regarding safety and efficacy of early rehabilitative strategies for several stroke domain-specific deficits...
November 7, 2017: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/29113398/combing-nlr-v20-and-mean-lung-dose-to-predict-radiation-induced-lung-injury-in-patients-with-lung-cancer-treated-with-intensity-modulated-radiation-therapy-and-chemotherapy
#12
Wen-Yan Pan, Chao Bian, Guan-Lian Zou, Cui-Ying Zhang, Ping Hai, Ren Zhao, Yan-Yang Wang
The purpose was to evaluate the predictive value of baseline neutrophil to lymphocyte ratio (NLR) level in the incidence of grade 3 or higher radiation induced lung injury (RILI) for lung cancer patients. A retrospectively analysis with 166 lung cancer patients was performed. All of the enrolled patients received chemoradiotherapy at our hospital between April 2014 and May 2016. The Cox proportional hazard model was used to identify the potential risk factors for RILI. In this cohort, the incidence of grade 3 or higher RILI was 23...
October 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/29113008/-drug-therapy-in-coeliac-disease-from-bench-to-bedside
#13
Jürgen Stein, Jörg-Dieter Schulzke, Detlef Schuppan
Coeliac disease is one of the most common diseases worldwide, with an estimated global prevalence of 0.5 - 1 %. The disease is triggered by a combination of environmental (gluten proteins from wheat, rye or barley) and genetic factors (mainly the human leucocyte antigens HLA-DQ2 or -DQ8). At present, a strict gluten-free diet (GFD) represents the only treatment option. However, strict adherence to a GFD is challenging, since even highly motivated patients may be subject to inadvertent or background exposure to gluten...
November 7, 2017: Zeitschrift Für Gastroenterologie
https://www.readbyqxmd.com/read/29103204/invitro-evaluation-of-torin2-and-2-6-dihydroxyacetophenone-in-colorectal-cancer-therapy
#14
Ankita Awasthi, Pharvendra Kumar, Chittur V Srikanth, Shakti Sahi, Rekha Puria
Colorectal cancer (CRC) is one of the most prevalent cancers diagnosed worldwide. Despite recent advances, resistance to cytotoxic and targeted therapy remains one of the greatest challenges in long-term management of colorectal cancer therapy. Recently established role of mTOR signaling in proliferation of CRC has incited for evaluation of mTOR kinase specific inhibitors in CRC therapy. Second generation mTOR kinase inhibitors including Torin2 has demonstrated efficient anticancer properties against variety of cancers and are in various stages of drug development...
November 4, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/29099720/derivation-of-mean-dose-tolerances-for-new-fractionation-schemes-and-treatment-modalities
#15
Zoltán Perkó, Thomas R Bortfeld, Theodore S Hong, John Wolfgang, Jan Unkelbach
Avoiding toxicities in radiotherapy requires the knowledge of tolerable organ doses. For new, experimental fractionation schemes (e.g. hypofractionation) these are typically derived from traditional schedules using the Biologically Effective Dose (BED) model. In this report we investigate the difficulties of establishing mean dose tolerances that arise since the mean BED depends on the entire spatial dose distribution, rather than on the dose level alone. Methods: A formula has been derived to establish mean physical dose constraints such that they are mean BED equivalent to a reference treatment scheme...
November 3, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29097074/a-phase-ii-toxicity-end-point-trial-icorg-99-09-of-accelerated-dose-escalated-hypofractionated-radiation-in-non-small-cell-lung-cancer
#16
D N Cagney, P G Thirion, M T Dunne, C Fleming, D Fitzpatrick, C M O'Shea, M A Finn, S O'Sullivan, C Booth, C D Collins, S J Buckney, A Shannon, J G Armstrong
AIMS: The objective of this phase II clinical trial was to prospectively evaluate the safety and efficacy of accelerated hypofractionated three-dimensional conformal radiation therapy (3DCRT) in localised non-resectable/non-operable non-small cell lung cancer (NSCLC). MATERIALS AND METHODS: Sixty patients with stage I-III NSCLC were enrolled in a prospective single-arm All Ireland Co-operative Oncology Research Group (ICORG 99-09) toxicity end point phase II trial...
October 30, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/29089989/constraint-induced-movement-therapy-in-treatment-of-acute-and-sub-acute-stroke-a-meta-analysis-of-16-randomized-controlled-trials
#17
Xi-Hua Liu, Juan Huai, Jie Gao, Yang Zhang, Shou-Wei Yue
OBJECTIVE: The aim of this meta-analysis was to evaluate the clinical efficacy of constraint-induced movement therapy in acute and sub-acute stroke. DATA SOURCES: The key words were stroke, cerebrovascular accident, constraint-induced therapy, forced use, and randomized controlled trial. The databases, including China National Knowledge Infrastructure, WanFang, Weipu Information Resources System, Chinese Biomedical Literature Database, PubMed, Medline, Embase, the Cochrane Central Register of Controlled Trials, and the Cochrane Database of Systematic Reviews, were searched for studies on randomized controlled trials for treating acute or sub-acute stroke published before March 2016...
September 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29075259/virus-specific-t-cells-for-the-immunocompromised-patient
#18
REVIEW
Amy Houghtelin, Catherine M Bollard
While progress has been made in the treatment of both hematologic cancers and solid tumors, chemorefractory or relapsed disease often portends a dismal prognosis, and salvage chemotherapy or radiation expose patients to intolerable toxicities and may not be effective. Hematopoietic stem cell transplant offers the promise of cure for many patients, and while mismatched, unrelated or haploidentical donors are increasingly available, the recipients are at higher risk of severe immunosuppression and immune dysregulation due to graft versus host disease...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29075064/role-of-arsenic-trioxide-in-the-management-of-aplastic-anemia
#19
Gaurav Prakash, Uday Yanamandra, Alka Khadwal, Neelam Varma, Subhash Varma, Pankaj Malhotra
Aplastic anemia is a common problem in the developing world with therapeutic challenges as most of the patients are non-affording to standard care owing to resource constraints. We present the results of an open label single arm, non-randomized, single center, prospective phase II trial of the compassionate use of arsenic trioxide in patients refractory to ATG or unable to afford the standard of care therapy. The study was prematurely terminated at eighth week due to non-response in 100% of patients and death in two patients...
December 2017: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/29074355/maximization-of-viability-time-in-a%C3%A2-mathematical-model-of-cancer-therapy
#20
Alexander Bratus, Igor Samokhin, Ivan Yegorov, Daniil Yurchenko
In this paper, we study a dynamic optimization problem for a general nonlinear mathematical model for therapy of a lethal form of cancer. The model describes how the populations of cancer and normal cells evolve under the influence of the concentrations of nutrients (oxygen, glucose, etc.) and the applied therapeutic agent (drug). Regulated intensity of the therapy is interpreted as a time-dependent control strategy. The therapy (control) goal is to maximize the viability time, i. e., the duration of staying in a so-called safety region (which specifies safe living conditions of a patient in terms of constraints on the amounts of cancer and normal cells), subject to limited resources of the therapeutic agent...
October 23, 2017: Mathematical Biosciences
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