Radiation oncology at JINR in brief Dzhelepov Laboratory of Nuclear ProblemsJoint Institute for Nuclear Research, Dubna, Russia

Accelerator technique proton and carbon treatment of tumors; New types of detector systems for spectrometric computed tomography (CT), for combined magnetic resonance tomography (MRT)/positron emission tomography (PET). Dr. D.V. Kamanin, ICSTI Conference 20 May 2010, Baku

HADRON THERAPY IN WORLD AND IN RUSSIA 2.3 million of tumor patients there are in Russia 450 thousands of new patients are appeared per year. The proton therapy is recommended 50 thousands of patients per year in Russia.

There are 25 centers of the proton therapy and 4 centers of carbon therapy at the world now. More than 60 thousand patients were treated with application of hadron therapy during last 50 years, 60 % of them were treated over last 10 years and 90% of total patients now treated in the hospital based facilities.

NANOTECHNOLOGIES IN HADRON THERAPY

Photo of irradiated human cells taken at the fluorescent microscope. Fluorescent markers (-H2AX) demonstrate nanostructured double-strand lesions of DNA molecules caused by carbon ions and occasional structure by x-rays. At the heart of carbon therapy is the nanotechnology where nanostructure of local radiation damages is produced along trajectories of ions with characteristic cross dimension of a few nanometers and a root-mean-square distance between the damages several hundred nanometers, covering the structure of DNA molecules in the tumor cells with a probability of 80%. The arising two-strand lesions of DNA molecules are irreversible because of high linear energy transfer (LET) for particles stopped in the tumor, while the structure of radiation damages in normal tissues at low LET ensures less than 1020% probability of complications in these tissues, producing damages that allow cell functioning to be restored after irradiation. a) carbon ions b) X-rays

JINR Medical-Technical Complex on proton beams of synchrocyclotronDuring last years around 100 patients per year were radiated by proton beam in JINR Medical-Technical Complex in frame of research program of Medical Radiological Research Center of Russian Medical Academy of Science.1967 First investigations at cancer treatment; 1968 1974 84 patients were treated by proton beams on synchrocyclotron; 1975 1986 Upgrade of synchrocyclotron, creation of Medic-Technical Complex (MTC) of hadron therapy in JINR; 1987 1996 40 patients were radiated by proton beams;1999 Creation of radiological department in Dubna hospital;2000 2010 620 patients were treated by proton beam.

JINR treatment by medical proton beams

Diseases treatedMeningiomas 112 ptsChordomas, chordosarkomas 19 ptsGliomas 33 ptsAcoustic Neurinomas 7 ptsAstrocytomas 24Paragangliomas 5 ptsPituitary Adenomas 17 ptsAVMs 60 ptsBrain and other metastasis 53 ptsOther head and neck tumours 134 ptsMelanomas 7 ptsSkin diseases 42 ptsCarcinoma metastasis of the lung 9 ptsBreast cancer 44 ptsProstate Adenomas 1 ptSarcomas 9 ptsOther 19 pts

YearNo of accelerator runsNo of patients treated1999232000436200154920024342003684200469020051242006Fire accident----2007784200868720092010 (March)7110625Total49620

JINR MTC WITH PROTON BEAMSCancer treatment in cabin 1Prostate treatment equipment3D conformal proton beam treatment were realized in Russia only in JINR.

CANCER TREATMENT ON PHASOTRON BEAMSPlan of proton treatment of brain cancer tissue (right), NMR tomogram before treatment (left) NMR tomogram after 3 months later (down)

DUBNA CYCLOTRON CENTER OF PROTON THERAPYDubna Center of Radiation Medicine (CRM) involves: Cyclotron Center of Proton Therapy, PET center, Department of convention radiotherapy with electron linac, Diagnostic department, Proton therapy clinic. The scheme of accelerator equipment of Dubna CRM.The Center of proton therapy has 3 treatment cabins, 1 with the gantry and 2 rooms with the fixed beams.

About 1000 patients per year will be treated there.

Modified Cyclotron C235JINR-IBA collaboration develops a medical cyclotron for the proton therapy. This year it is planned to complete its construction and assembling and in 2011 to carry out the beam tests. After that the accelerator could be installed in the Dubna hospital Centre of proton therapy.The main modernization efforts are directed on optimization of the magnetic system oriented on an increase of the axial betatron frequency. Simulation of magnetic field.Azimuthal angle variation

CARBON CANCER TREATMENT The carbon 12C6+ ion beams at intensity of 109 pps are efficiently used for cancer treatment especially for patients with radioresistant tumor targets.COMPACT SUPERCONDUCTING CYCLOTRON C400 FOR HADRON THERAPY The construction of C400 is planed to start in September 2010 in the framework of Arhade project (France, Caen)

Present status of X-ray techniqueWorld market of medical x-ray technique is about13 bln. $/year

Schemes of X-ray detector systemsCr compensated GaAs

Development and production of pixel semiconductor detectors

GaAs pixel detector with pixelsize of 50 m and 65536 channels of electronics

X-ray computer tomographdetectorsX ray images obtained at different wavelengths for iodine, calcium and airScheme at transition from standard gray X-ray picture to color picture of separate structures

SPECTROMETRY X-RAY DETECTION IN COLOR RADIOGRAHY

Novel Micropixel Avalanche Photodiodes (MAPD) with super high pixel densityApplication of MAPD in nanoindustry: laser location, lines of optical transformation of information, systems of optical reading information of ultrahigh density, luminescence of quantum dotteds, investigation of human cells, investigation of DNA molecules.Medical applications: PET and combined PET/MRT

MAPD APLICATION FOR POSITRON EMISSION TOMOGRAPHY(PET)AND COMBINED PET/MRT

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