76
|
Scholz M, Müller E, Kröhne U, Böcker M, Forkmann T, Wirtz M. [Validation of the computerized adaptive assessment procedure RehaCAT related to functional and mental strain in a sample of rehabilitation patient suffering from musculoskeletal diseases]. REHABILITATION 2014; 53:290-6. [PMID: 25185024 DOI: 10.1055/s-0034-1384595] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The Rasch-based, computerized adaptive assessment procedure RehaCAT allows to assess the ICF-oriented dimensions "activities in daily living", "functionality upper extremities" and "functionality lower extremities" as well as "depression" economically and reliably in orthopaedic rehabilitation patients. This validation study aimed at analyzing the multivariate association of the RehaCAT dimensions with the commonly applied ODI, SF-12 and HADS-D assessment scales in a sample of rehabilitation patient suffering from musculoskeletal diseases (spine disease: 58,7%). By means of structural equation modeling high convergent and divergent validity of the RehaCAT dimensions could be proven in a sample of N=184 rehabilitation patients (71,2% inpatient and 28,8% outpatient). In the resulting model between 41% (functionality upper extremities) and 76% (activities in daily living) of the RehaCAT dimensions could be explained mainly by the theoretical assumed predictor constructs. Because of its psychometric foundation, economy and validity, the RehaCAT provides an optimal basis to assess central ICF-oriented constructs in orthopaedic rehabilitation.
Collapse
|
77
|
Nitz U, Gluz O, Huober J, Kreipe H, Kates R, Hartmann A, Erber R, Scholz M, Lisboa B, Mohrmann S, Möbus V, Augustin D, Hoffmann G, Weiss E, Böhmer S, Kreienberg R, Du Bois A, Sattler D, Thomssen C, Kiechle M, Jänicke F, Wallwiener D, Harbeck N, Kuhn W. Final analysis of the prospective WSG-AGO EC-Doc versus FEC phase III trial in intermediate-risk (pN1) early breast cancer: efficacy and predictive value of Ki67 expression. Ann Oncol 2014; 25:1551-7. [DOI: 10.1093/annonc/mdu186] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
78
|
Boehm A, Lindner F, Wichmann G, Bauer U, Wittekind C, Knoedler M, Lordick F, Dietzsch S, Scholz M, Kortmann R, Dietz A. Impact of indication-shift of primary and adjuvant chemo radiation in advanced laryngeal and hypopharyngeal squamous cell carcinoma. Eur Arch Otorhinolaryngol 2014; 272:2017-25. [PMID: 24961436 DOI: 10.1007/s00405-014-3134-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 06/03/2014] [Indexed: 01/15/2023]
Abstract
Based on level I evidence, postoperative platinum-based radiochemotherapy (PORCT) is the recommended standard of care in defined risk situations after resection of squamous cell carcinomas of the larynx and hypopharynx (LHSCC). The value of the addition of chemotherapy to adjuvant radiation in intermediate and high risk situations other than extracapsular spread or R1-/R2 resection is still debated. From 1993 to 2009, 555 patients (median follow-up: 24.4 months) with advanced LHSCC (UICC stages III-IVB) were treated in a curative intent. Patient data were continuously documented in the county of Leipzig cancer registry and were retrospectively analyzed as mono institutional survey. PORCT was introduced into the standard procedures in 2004, but also applied before in selected cases. Based on this paradigm shift, the patient population was divided into two comparative groups treated before and after 2004. 361 patients were treated before 2004. 43.8 % received primary surgery (OP) + postoperative radiotherapy (PORT) and 20.2 % OP + PORCT. 194 patients were treated after 2004: 21.1 % received OP + PORT and 35.6 % OP + PORCT. Regarding the PORCT groups, 20.6 % received cisplatin plus 5FU before 2004 which shifted to 59.4 % after 2004. The 3-year tumor-specific-survival rate of the whole cohort was improved from 47 to 60 % (p = 0.006). The subgroup treated with OP + PORT or PORCT improved from 56.1 to 68.5 % (p = 0.028). Localization proved to be a significant and independent factor. Only patients with advanced laryngeal cancer had significant improved survival (p < 0.01), while the improvement for hypopharyngeal cancer patients was not significant (p < 0.2). After 2004, there was a slight increase (+10.2 %) of primary radiochemotherapy (pRCT) due to stronger selection if R0 > 5 mm-resectability is unlikely. Standardised use of PORCT and pRCT considering clear indications showed to be significantly involved in improved survival in advanced LHSCC.
Collapse
|
79
|
Klasinc L, Novak I, Kluge G, Scholz M. Das Photoelektronenspektrum von Pyridin-N-Oxid anhand von Hel/Hell- Intensitäten [1] / Assignment of the Pyridine-N-oxide Photoelectron Spectrum on the Basis of Hel/Hell Intensities [1]. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-1980-0611] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Comparison of Hel and Hell photoelectron (PE) spectra of pyridine-N-oxide enables the completion of the assignment of its electronic structure
Collapse
|
80
|
Schmidt S, Scholz M, Haberbosch L, Mante A, Obermayer K, Brandt S. P273: Fast induction of alpha entrainment with bandwidth confined electric and photic stimulation. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50394-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
81
|
Liu X, Scholz M, Tönjes A, Stumvoll M, Stadler PF, Böttcher Y. Analysis of parent of origin effects in Sorbs using long range phasing algorithms. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1375033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
82
|
Chmiel R, Winkler C, Beyerlein A, Köhler M, Knopff A, Matzke C, Scholz M, Ziegler AG. Combined analysis of perinatal and infant risk factors for type 1 diabetes. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1375059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
83
|
Kühn D, Heninger AK, Eugster A, Dietz S, Winkler C, Scholz M, Ziegler AG, Bonifacio E. Activation of autoreactive CD4+ T cells is synchronous to islet autoantibody seroconversion and shows an IFNγ signature. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1375044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
84
|
Kandziora F, Pflugmacher R, Scholz M, Schäfer J, Schollmeier G, Schnake KJ, Bail H, Duda G, Haas NP. Experimentelle Spondylodese der Schafshalswirbelsäule Teil 1: Der Effekt des Cage-Designs auf die intervertebrale Fusion. Chirurg 2014; 73:909-17. [PMID: 12297957 DOI: 10.1007/s00104-002-0489-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
INTRODUCTION There has been a rapid increase in the use of interbody fusion cages as an adjunct to spondylodesis, although experimental data are lacking. A sheep cervical spine interbody fusion model was used to determine the effect of different cage design parameters (endplate-implant contact area, maximum contiguous pore) on interbody fusion. MATERIAL AND METHOD IN VITRO EVALUATION: 24 sheep cadaver specimens (C2-C5) were tested in flexion, extension, axial rotation, and lateral bending with a nondestructive flexibility method using a nonconstrained testing apparatus. Four different groups were examined: (1) control group (intact) ( n=24), (2) autologous tricortical iliac crest bone graft ( n=8), (3) Harms cage ( n=8), and (4) SynCage-C ( n=8). IN VIVO EVALUATION: 24 sheep underwent C3/4 discectomy and fusion: group 1: autologous tricortical iliac crest bone graft ( n=8), group 2: Harms cage filled with autologous cancellous iliac crest bone grafts ( n=8), and group 3: SynCage-C filled with autologous cancellous iliac crest bone grafts ( n=8). Radiographic scans were performed pre- and postoperatively and after 1, 2, 4, 8, and 12 weeks, respectively. At the same time points, disc space height (DSH), height index (HI), intervertebral angle (IVA), and endplate angle (EA) were measured. After 12 weeks the animals were killed and fusion sites were evaluated using biomechanical testing in flexion, extension, axial rotation, and lateral bending. Additionally, histomorphological and histomorphometrical analyses were performed. RESULTS Over a 12-week period the cage groups showed significantly higher values for DSH, HI, IVA, and EA compared to the bone graft. In vivo stiffness was significantly higher for the tricortical iliac crest bone graft and Harms cage than in vitro stiffness. However, there was no difference between in vitro and in vivo stiffness of the SynCage-C. Histomorphometrical evaluation showed a more progressed bone matrix formation in the Harms cage group than in both other groups. CONCLUSION The parameter endplate-implant contact area was not able to determine subsidence of cages. In contrast, the maximum contiguous pore of a cage significantly correlates with interbody bone matrix formation inside the cage. Additionally, there was no correlation between in vitro and in vivo stiffness of interbody fusion cages. Therefore, biomechanical in vitro studies are not able to determine in vivo outcome of fusion cages. Animal experimental evaluations of interbody fusion cages are essential prior to clinical use.
Collapse
|
85
|
Heiland DH, Petridis AK, Maslehaty H, Thissen J, Kinzel A, Scholz M, Schreiber L. Efficacy of a new video-based training model in spinal surgery. Surg Neurol Int 2014; 5:1. [PMID: 24575316 PMCID: PMC3927092 DOI: 10.4103/2152-7806.124973] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 10/16/2013] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND An important part of neurosurgical training is the improvement of surgical skills. Acquiring microsurgical skills follows a learning curve, influenced by specific exercises, feedback, and training. Aim of training should be rapid learning success. The study shows the way in which video-based training can influence the learning curve. METHODS Over a period of 18 months (2011-2012) 12 residents were evaluated in spinal surgery (12 cases per resident) by a skilled evaluator based on different criteria. The evaluation criteria (exposition of important anatomy, intraoperative bleeding, efficacy of using bipolar cauterization) were weighted and added to a single quality-score. The participating residents were divided into two groups. Only one group (n = 5) received video-based training. RESULTS Residents showed an individually different but explicit increase in microsurgical skills. The quality-score during the first surgery compared with the end point of the study demonstrated a faster improvement of surgical skills in the group with video-based training than in the group without special training. Considering all residents together, the video-training group displayed a steeper gradient of microsurgical success. Comparison of the single resident's microsurgical skills showed individual disparities. Various biases that influence the learning success are under examination. CONCLUSION Video-based training can improve microsurgical skills, leading to an improved learning curve. An earlier entry of the learning curve plateau in the video-training group promotes a higher acquisition of surgical skills. Because of the positive effect, we plan to apply the video-based training model to other neurosurgical subspecialties, especially neurovascular and skull base surgery.
Collapse
|
86
|
Kugler K, Ohs B, Scholz M, Wessling M. Towards a carbon independent and CO2-free electrochemical membrane process for NH3 synthesis. Phys Chem Chem Phys 2014; 16:6129-38. [DOI: 10.1039/c4cp00173g] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new NH3 synthesis process using an electrochemical membrane reactor including N2 production and product separation is modelled in Aspen+.
Collapse
|
87
|
Scholz M, Müller E, Kröhne U, Böcker M, Forkmann T, Wirtz M. [Confirmatory analysis of the dimensional structure of the ODI, the SF-12 and the HADS-D scales in a sample of rehabilitation patients with musculoskeletal diseases]. REHABILITATION 2013; 53:118-23. [PMID: 24217889 DOI: 10.1055/s-0033-1347229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This study aimed at confirmatory testing the factorial structure of the established assessment instruments ODI, SF-12 and HADS-D by means of structural equation modeling in a sample of n=184 rehabilitation patients with musculo-skeletal diseases. According to local and global fit indices for each instrument an acceptable to good fit to the underlying theoretical model could be verified. For the ODI as well as for the HADS-D only single weak item-construct associations indicated shortcomings in the assumed model structure. For the SF-12 the constructs "physical health" and "mental health" could be validated after defining the additional first order factors "role - physical", "role - emotional" and "well-being", respectively. In general, the study findings proved the factorial validity of the instruments. Additionally, specific measurement properties on item and structural level could be identified which might enhance the understanding of construct definitions in rehabilitation patients with musculoskeletal diseases.
Collapse
|
88
|
Tommasino F, Friedrich T, Scholz U, Taucher-Scholz G, Durante M, Scholz M. A DNA Double-Strand Break Kinetic Rejoining Model Based on the Local Effect Model. Radiat Res 2013; 180:524-38. [DOI: 10.1667/rr13389.1] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
89
|
Friedrich T, Grün R, Scholz U, Elsässer T, Durante M, Scholz M. Sensitivity analysis of the relative biological effectiveness predicted by the local effect model. Phys Med Biol 2013; 58:6827-49. [DOI: 10.1088/0031-9155/58/19/6827] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
90
|
Scholz M, Holch F, Sauer C, Wiessner M, Schöll A, Reinert F. Core hole-electron correlation in coherently coupled molecules. PHYSICAL REVIEW LETTERS 2013; 111:048102. [PMID: 23931410 DOI: 10.1103/physrevlett.111.048102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Indexed: 06/02/2023]
Abstract
We study the core hole-electron correlation in coherently coupled molecules by energy dispersive near edge x-ray absorption fine-structure spectroscopy. In a transient phase, which exists during the transition between two bulk arrangements, 1,4,5,8-naphthalene-tetracarboxylicacid-dianhydride multilayer films exhibit peculiar changes of the line shape and energy position of the x-ray absorption signal at the C K-edge with respect to the bulk and gas phase spectra. By a comparison to a theoretical model based on a coupling of transition dipoles, which is established for optical absorption, we demonstrate that the observed spectroscopic differences can be explained by an intermolecular delocalized core hole-electron pair. By applying this model we can furthermore quantify the coherence length of the delocalized core exciton.
Collapse
|
91
|
Eley J, Friedrich T, Homann K, Mahajan A, Durante M, Bert C, Howell R, Scholz M, Newhauser W. SU-E-T-278: Risk of Developing a Second Cancer in the Breast for Hodgkin Lymphoma Patients Receiving Carbon Ion Therapy Versus Proton Therapy. Med Phys 2013. [DOI: 10.1118/1.4814712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
92
|
Ennen S, Scholz M, Voigt K, Failing K, Wehrend A. Puerperal development of ewes following dystocia: a retrospective analysis of two approaches to caesarean section. Vet Rec 2013; 172:554. [DOI: 10.1136/vr.101370] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
93
|
Raab J, Haupt F, Kordonouri O, Scholz M, Wosch A, Ried C, Aschemeier B, Danne T, Ziegler AG, Winkler C. Kontinuierlicher Anstieg der Insulinresistenz vor und nach dem Beginn der Pubertät - Ergebnisse bei Kindern mit einem erhöhten Typ 1 Diabetes Risiko. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
94
|
Müller MK, Ludewig E, Oechtering G, Scholz M, Flegel T. The vacuum phenomenon in intervertebral disc disease of dogs based on computed tomography images. J Small Anim Pract 2013; 54:253-7. [PMID: 23565773 DOI: 10.1111/jsap.12063] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Vacuum phenomenon is suspected to be indicative of disc degeneration and subsequent herniation. The objective of this study was to assess the reliability of vacuum phenomenon for identification of herniated discs causing neurological signs. Prevalence of vacuum phenomenon and influencing factors in dogs with disc herniation were determined. METHODS Retrospective review of computed tomography scans from dogs with suspected disc herniation for the presence of gas within intervertebral disc space with subsequent comparison of vacuum phenomenon and herniated disc as confirmed by surgery. Subgroups were created (chondrodystrophic, non-chondrodystrophic and unknown classification) to analyse prevalence and influencing factors (age, breed and gender) for vacuum phenomenon and agreement with herniated disc. RESULTS Prevalence of vacuum phenomenon in all dogs, chondrodystrophic, non-chondrodystrophic dogs and those with unknown classification was 19·8, 14·9, 35·7 and 24·5%, respectively. Corresponding correlation rate between vacuum phenomenon and herniated disc was 64, 67, 40 and 82%. Prevalence of vacuum phenomenon was significantly higher in nonchondrodystrophic dogs (P=0·04). Age was the only factor influencing prevalence of vacuum phenomenon (P=0·04). CLINICAL SIGNIFICANCE In dogs with intervertebral disc disease, vacuum phenomenon is a frequent but inconsistent finding. Although helpful to identify degenerated discs, it is not suitable to identify currently herniated disc with sufficient accuracy.
Collapse
|
95
|
Wernet P, Beye M, de Groot F, Düsterer S, Gaffney K, Grübel S, Hartsock R, Hennies F, Josefsson I, Kennedy B, Kunnus K, Leitner T, Mazza T, Meyer M, Nordlund D, Odelius M, Quevedo W, Radcliffe P, Rajkovic I, Schlotter B, Scholz M, Schreck S, Suljoti E, Techert S, Turner J, Weniger C, Zhang W, Föhlisch A. Mapping chemical bonding of reaction intermediates with femtosecond X-ray laser spectroscopy. EPJ WEB OF CONFERENCES 2013. [DOI: 10.1051/epjconf/20134105025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
96
|
Eszlinger M, Krogdahl A, Münz S, Rehfeld C, Jensen E, Ferraz C, Bösenberg E, Drieschner N, Scholz M, Hegedüs L, Paschke R. BRAF, NRAS, HRAS, KRAS, PAX8/PPARG, RET/PTC mutation screening in routine air dried Fine Needle Aspiration (FNA) smears from 310 patients with nodular thyroid disease. Exp Clin Endocrinol Diabetes 2013. [DOI: 10.1055/s-0033-1336704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
97
|
Li MM, Pan HC, Huang SL, Scholz M. Controlled Experimental Study on Removing Diesel Oil Spillages Using Agricultural Waste Products. Chem Eng Technol 2013. [DOI: 10.1002/ceat.201200658] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
98
|
Karger C, Peschke P, Scholz M, Debus J. PO-0901: Modeling RBE for spinal cord after carbon ion radiotherapy: comparison with experimental and clinical Data. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33207-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
99
|
Rehak M, Spies E, Scholz M, Wiedemann P. Behandlung der Patienten mit einem Venenastverschluss in Abhängigkeit von der Verschlussdauer. Ophthalmologe 2012; 110:966-74. [DOI: 10.1007/s00347-012-2723-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
100
|
Grün R, Friedrich T, Elsässer T, Krämer M, Zink K, Karger CP, Durante M, Engenhart-Cabillic R, Scholz M. Impact of enhancements in the local effect model (LEM) on the predicted RBE-weighted target dose distribution in carbon ion therapy. Phys Med Biol 2012; 57:7261-74. [PMID: 23075883 DOI: 10.1088/0031-9155/57/22/7261] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Biological optimization for treatment planning in carbon ion therapy is currently based on the first version of the local effect model (LEM I). Further developments implemented in the latest version (LEM IV) allowed to predict more accurately the Relative Biological Effectiveness (RBE) in-vitro. The main goal of this study is to compare the LEM IV against LEM I under treatment-like conditions for idealized target geometries. Therefore, physical dose distributions resulting from the biological optimization with LEM I were used to recalculate the RBE-weighted dose distribution based on LEM IV. Input parameters representing the clinical endpoints late toxicity in the central nervous system and the tumor control for chordoma were chosen to investigate the impact of changes on the predicted isoeffective dose levels. The recalculated RBE-weighted dose distributions show an increase within the target region, and the mean RBE-weighted dose values are dependent on the geometry and decrease with increasing target dimension. The differences between predictions of LEM IV and LEM I are less than 10% for typical tumor volumes treated in the pilot project at GSI. Median RBE-weighted doses predicted by LEM IV in the target region are consistent with clinically observed dose-response behavior as demonstrated by comparison to the 5-year local control curve for skull base chordoma.
Collapse
|