The activity of the Medical Physics Group is concentrated on three objectives, namely:

· Experimental studies of interaction of charged particles with nanometre structures with Jet Counter set-up

· Medical dosimetry – dosimetry for brachytherapy

· Brachytherapy systems with photon needle

Jet Counter group

Activity of this group started with construction of the first in the world device called “Track Ion Counter” [1] (Read the article). The idea of the device was based on simulation of a nanometre structures in gas using the differential pumping system. At time of developing the device (middle of 70-ties) it appeared that it would be difficult to achieve the larger simulated structures with this system. Therefore the team turned on another principle of generation of simulated structures in gas using “pulsed gas jet”. This idea is nowadays explored successfully in the form of a set-up called “Jet Counter”.

There are few publications in which the results of investigation of “Jet Counter” are described. The first experiments were carried out for nitrogen and for alpha particles of Am-241 [2]. The results of this experiment were compared with calculation performed by Dr. B. Grosswendt who simulated the experiment by Monte Carlo code. [3]. The list of published papers on Jet Counter and relevant experiments is attached:

1. A TRACK ION COUNTER

S. Pszona

Proc. 5^th Symp. on Microdosimetry. Report EUR 3452 (Luxembourg: Commission of the European Communities) pp 1107 – 1121 (1976) (Read the article)

2. A NEW METHOD FOR MEASURING ION CLUSTERS PRODUCED BY CHARGED PARTICLES IN NANOMETRE TRACK SECTION OF DNA SIZE.

S. Pszona, J. Kula, S. Marjańska

Nucl. Instrum. Meth. A 447 601 – 607 (2000)

3. FORMATION OF ION CLUSTERS BY ALPHA-PARTICLES IN "NANOMETRIC"

VOLUMES OF NITROGEN: EXPERIMENT AND CALCULATION

B. Grosswendt and S. Pszona

Radiat. Prot. Dosim. 99, 331-335 (2002)

4. IONIZATION CLUSTERS AT DNA LEVEL – EXPERIMENTAL MODELING

S. Pszona and J. Kula

Radiat. Prot. Dosim. 99, 387-390 (2002) (Read the article)

5. THE TRACK STRUCTURE OF ALPHA-PARTICLES FROM THE POINT OF VIEW

OF IONIZATION-CLUSTER FORMATION IN 'NANOMETRIC' VOLUMES OF NITROGEN

B.Grosswendt and S.Pszona

Radiation Environ. Biophys., 41, 91-102 ( 2002)

6. CLUSTERS OF IONISATION IN NANOMETRE TARGETS FOR PROPANE – EXPERIMENTS WITH A JET COUNTER
A. Bantsar, B. Grosswendt, J. Kula and S. Pszona
Radiat. Prot. Dosim. (2004), Vol. 110, Nos 1-4, pp. 845-850 (View the first page)
(Read the article)

7. EXPERIMENTAL EQUIVALENT CLUSTER-SIZE DISTRIBUTIONS IN NANOMETRIC VOLUMES OF LIQUID WATER
B. Grosswendt, L. De Nardo, P. Colautti, S. Pszona, V. Conte and G. Tornielli
Radiat. Prot. Dosim. (2004), Vol. 110, Nos 1-4, pp. 851-857

8. IONISATION CLUSTER SIZE DISTRIBUTION FOR ALPHA PARTICLES: EXPERIMENT, MODELLING
S. Pszona, A. Bantsar and H. Nikjoo
Radiat. Prot. Dosim. (2006), Vol. 122, Nos 1-4, pp. 28-31 (View the first page)

9. FORMATION OF ION CLUSTERS BY LOW-ENERGY ELECTRONS IN NANOMETRIC TARGETS: EXPERIMENT AND MONTE CARLO SIMULATION
A. Bantsar, B. Grosswendt, and S. Pszona
Radiat. Prot. Dosim. (2006), Vol. 122, Nos 1-4, pp. 82-85 (View the first page)

10. NEW DESCRIPTORS OF RADIATION QUALITY BASED ON NANODOSIMETRY, A FIRST APPROACH
B. Grosswendt, S. Pszona and A. Bantsar
Radiat. Prot. Dosim. (2007), Vol. 126, Nos 1-4, pp. 432-444 (View the first page)

11. CHARGE CLUSTER DISTRIBUTION IN NANOSITES TRAVERSED BY A SINGLE IONIZING PARTICLE – AN EXPERIMENTAL APPROACH
S. Pszona, A. Bantsar, J. Kula
Nucl. Instr. Meth. B (2008), Vol. 266, pp. 4911-4915 (View the first page)

12. SINGLE TRACK NANODOSIMETRY OF LOW ENERGY ELECTRONS
A. Bantsar, B. Grosswendt, S. Pszona, J. Kula
Nucl. Instr. Meth. A (2009), Vol. 599, pp. 270-274 (View the first page)

Medical Dosimetry Group

The specialty of the group is ionization methods of measuring of such quantities like absorbed dose for beta source used for intravascular brachytherapy and air Kerma for soft X-rays. The group is using both experimental methods as well the computational ones (Monte Carlo) for deriving the response of the ionisation detectors. The list of publications is attached.

1.   A NEW METHOD FOR STANDARDISING ABSORBED DOSE FOR BETA/GAMMA RADIOACTIVE WIRES USED IN ENDOVASCULAR BRACHYTHERAPY.

S.Pszona, B. Kocik and W. Bulski

Syllabus of IV Cardiovascular Radiation Therapy, Washington, 02-07 February 2001, 12

2.   DOSIMETRY ASPECTS OF CARDIOVASCULAR BRACHYTHERAPY

W. Bulski, S. Pszona, M. Kawczynska

Acta Medica Lituanica Suppl.9, 94-96, (2002)

3.   IVUS DOSIMETRY FOR INTRACORONARY BETA BRACHYTHERAPY AFTER STENTING- WHAT SHOULD BE THE TARGET.

A.Witkowski, M. Kawczynska, Z. Chmielak, P. Szmaus, J. Łyczek, W. Bulski, S. Pszona W. Ruzyłło

European Heart Journal Vol.4 Abstr. Suppl. Page 688,( 2002)

4.        THE SHIELDING EFFECT OF A GUIDE WIRE DURING BRACHYTHERAPY SESSION WITH P-32 SOURCE,

S. Pszona, W. Bulski, C. Kępka, A. Witkowski, K. Wincel, B. Zareba

Cardiovascular Radiation Medicine Vol 3 Nr ¾ pp205-208 (2003)

5.     IVUS DOSIMETRY FOR INTRACORONARY BETA BRACHYTERAPY AFTER STENTING – WHAT SHOULD BE THE TARGET?

A.Witkowski, Z. Chmielak, J.Łyczek, M. Kawczyńska, W. Bulski, A. Kulik, S. Pszona and W. Rużyłło

European Heart Journal v 4 Suppl. Page 688 ( 2002)

6.     INFLUENCE OF STENT STRUTS, QUIDE WIRE AND CALCIUM DEPOSIT ON DOSE DISTRIBUTIONS IN BRACHYTHERAPY OF CORONARY ARTERIES WITH P-32 LINEAR SOURCE

S. Pszona, W. Bulski, C. Kępka, A. Witkowski, K. Wincel, B. Zareba

Radiotherapy and Oncology Vol.68 Suppl. 1, p 84 (2003)

7.     THE SHIELDING EFFECT OF A GUIDE WIRE DURING BRACHYTHERAPY OF CORONARY ARTERIES WITH P-32 LINEAR SOURCE

S. Pszona, W. Bulski, C. Kępka, A.Witkowski

Radiotherapy and Oncology vol.66 , Suppl. 1, p.37 (2003)

8.     THE SHIELDING EFFECT OF A GUIDE WIRE DURING BRACHYTHERAPY SESSION WITH P-32 SOURCE

C.Kepka, S.Pszona, W. Bulski and A. Witkowski

Cardiovascular Radiation Medicine Vol 3, Nr 3 pp 205-208 (2003)

9.     SKUTECZNOŚĆ WEWNĄTRZNACZYNIOWEJ BRACHYTERAPII W LECZENIU RESTENOZY W STENCIE U CHORYCH NA CUKRZYCĘ

A.Witkowski, Z. Chmielak, J. Pręgowski, Ł. Kalińczuk, J.Łyczek, M. Kawczyńska, W. Bulski, A. Kulik, S. Pszona i W. Rużyłło

Folia Cardiologica V 10 Nr 2 127-134 (2003)

10.   KOMORA JONIZACYJNA DO POMIARU DAWKI POCHŁONIETEJ

B. Kocik, S.Pszona, E. Jaworska

Biuletyn Urzędu Patentowego Nr 14 (771), 35, 2003

11.   ANGIOGRAPHIC PATTERN OF RECURRENT IN-STENT RESTENOSIS FOLLOWING INTRAVASCULAR BRACHYTHERAPY DOES NOT CORRELATE WITH DELIVERED DOSE. A STUDY WITH DOSE VOLUME HISTOGRAMS

A Witkowski, J. Pręgowski, G. S. Mintz, Z. Chmielak, Ł. Kalińczuk, J. Łyczek, M.Kawczyńska, W. Bulski, A. Kulik, C. Kępka, M. Kruk, T. Deptuch, J. Owczarczyk, S.Pszona, W. Rużyłło

Cardiovascular Radiation Medicine Vol.4, Nr 4, 192-197, 2004

12.   DOSIMETRY OF BETA SOURCES FOR CARDIOVASCULAR BRACHYTHERAPY

W. Bulski, S. Pszona, M. Kawczyńska

Reports of Practical Oncology and Radiotherapy 2004, 9(2), 33-36

13.   A NEW APPROACH FOR STANDARDIZING ABSORBED DOSE FROM BETA RADIOACTIVE WIRES USED FOR INTRAVASCULAR BRACHYTHERAPY

S. Pszona, B. Kocik, K. Wincel, B. Zareba, W. Bulski

Proc. of International Symposium on Standards and Codes of Practice in Medical Radiation Dosimetry, 331-337 IAEA, Vienna 2003

14.   MNCP DOSE DISTRIBUTION FOR 32P BRACHYTERAPY WIRE SOURCE

K. Wincel, B. Zaręba

Proc. Workshop, Intercomparison on the Usage of Computational Code In Radiation Dosimetry,Bologna, Italy, July 14-16 2003

ENEA, 2004, pp 123-125

15.   A NOVEL IONIZATION CHAMBER FOR INTRAVASCULAR BRACHYTHERAPY

S. Pszona, K. Wincel, B. Zaręba W. Bulski, M. Kawczynska, C. Kepka and A. Witkowski

Nucl. Instr. Meth. A, 537 (2005) 666-671

X-ray device for brachytherapy – X-ray Needle

We are working on active spatial visualisation of radiation field - picture shows shining luminophore