human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "mri trus data fusion for brachytherapy"
  Abstract: Background#R##N#Prostate brachytherapy consists in placing radioactive seeds for tumour destruction under transrectal ultrasound imaging (TRUS) control. It requires prostate delineation from the images for dose planning. Because ultrasound imaging is patient- and operator-dependent, we have proposed to fuse MRI data to TRUS data to make image processing more reliable. The technical accuracy of this approach has already been evaluated.#R##N##R##N#Methods#R##N#We present work in progress concerning the evaluation of the approach from the dosimetry viewpoint. The objective is to determine what impact this system may have on the treatment of the patient. Dose planning is performed from initial TRUS prostate contours and evaluated on contours modified by data fusion.#R##N##R##N#Results#R##N#For the eight patients included, we demonstrate that TRUS prostate volume is most often underestimated and that dose is overestimated in a correlated way. However, dose constraints are still verified for those eight patients.#R##N##R##N#Conclusions#R##N#This confirms our initial hypothesis. Copyright © 2006 John Wiley & Sons, Ltd.

Connected through hyperedge HE-1 (induced by source paper "development of a novel robot for transperineal needle based interventions focal therapy brachytherapy and prostate biopsies"):
  with members:
    - "prostate biopsy tracking with deformation estimation"
    - "design of an ultrasound guided robotic brachytherapy needle insertion system"
    - "mri trus data fusion for prostate brachytherapy preliminary results"
    - "towards 3d ultrasound image based soft tissue tracking a transrectal ultrasound prostate image alignment system"
    - "prostate biopsies guided by three dimensional real time 4 d transrectal ultrasonography on a phantom comparative study versus two dimensional transrectal ultrasound guided biopsies"

Connected through hyperedge HE-2 (induced by source paper "prosper image and robot guided prostate brachytherapy"):
  with members:
    - "design of an ultrasound guided robotic brachytherapy needle insertion system"

Connected through hyperedge HE-3 (induced by source paper "atlas based prostate segmentation using an hybrid registration"):
  with members:
    - "mri trus data fusion for prostate brachytherapy preliminary results"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.OH(Other Computer Science)