Zeszyty czasopisma

Tom 29 (2023): Zeszyt 2 (June 2023)

Tom 29 (2023): Zeszyt 1 (March 2023)

Tom 28 (2022): Zeszyt 4 (December 2022)

Tom 28 (2022): Zeszyt 3 (September 2022)

Tom 28 (2022): Zeszyt 2 (June 2022)

Tom 28 (2022): Zeszyt 1 (March 2022)

Tom 27 (2021): Zeszyt 4 (December 2021)

Tom 27 (2021): Zeszyt 3 (September 2021)

Tom 27 (2021): Zeszyt 2 (June 2021)

Tom 27 (2021): Zeszyt 1 (March 2021)

Tom 26 (2020): Zeszyt 4 (December 2020)

Tom 26 (2020): Zeszyt 3 (September 2020)

Tom 26 (2020): Zeszyt 2 (June 2020)

Tom 26 (2020): Zeszyt 1 (March 2020)

Tom 25 (2019): Zeszyt 4 (December 2019)

Tom 25 (2019): Zeszyt 3 (September 2019)

Tom 25 (2019): Zeszyt 2 (June 2019)

Tom 25 (2019): Zeszyt 1 (March 2019)

Tom 24 (2018): Zeszyt 4 (December 2018)

Tom 24 (2018): Zeszyt 3 (September 2018)

Tom 24 (2018): Zeszyt 2 (June 2018)

Tom 24 (2018): Zeszyt 1 (March 2018)

Tom 23 (2017): Zeszyt 4 (December 2017)

Tom 23 (2017): Zeszyt 3 (September 2017)

Tom 23 (2017): Zeszyt 2 (June 2017)

Tom 23 (2017): Zeszyt 1 (March 2017)

Tom 22 (2016): Zeszyt 4 (December 2016)

Tom 22 (2016): Zeszyt 3 (September 2016)

Tom 22 (2016): Zeszyt 2 (June 2016)

Tom 22 (2016): Zeszyt 1 (March 2016)

Tom 21 (2015): Zeszyt 1 (December 2015)

Tom 20 (2014): Zeszyt 1 (March 2014)

Tom 19 (2013): Zeszyt 2 (December 2013)

Tom 19 (2013): Zeszyt 1 (March 2013)

Tom 18 (2012): Zeszyt 2 (June 2012)

Tom 18 (2012): Zeszyt 1 (March 2012)

Tom 17 (2011): Zeszyt 4 (December 2011)

Tom 17 (2011): Zeszyt 3 (September 2011)

Tom 17 (2011): Zeszyt 2 (June 2011)

Tom 17 (2011): Zeszyt 1 (March 2011)

Tom 16 (2010): Zeszyt 2 (June 2010)

Tom 16 (2010): Zeszyt 1 (March 2010)

Tom 15 (2009): Zeszyt 4 (December 2009)

Tom 15 (2009): Zeszyt 3 (September 2009)

Tom 15 (2009): Zeszyt 2 (June 2009)

Tom 15 (2009): Zeszyt 1 (March 2009)

Tom 14 (2008): Zeszyt 4 (December 2008)

Tom 14 (2008): Zeszyt 3 (September 2008)

Tom 14 (2008): Zeszyt 2 (June 2008)

Tom 14 (2008): Zeszyt 1 (March 2008)

Tom 13 (2007): Zeszyt 4 (December 2007)

Tom 13 (2007): Zeszyt 3 (September 2007)

Tom 13 (2007): Zeszyt 2 (June 2007)

Tom 13 (2007): Zeszyt 1 (March 2007)

Informacje o czasopiśmie
Format
Czasopismo
eISSN
1898-0309
Pierwsze wydanie
30 Dec 2008
Częstotliwość wydawania
4 razy w roku
Języki
Angielski

Wyszukiwanie

Tom 23 (2017): Zeszyt 1 (March 2017)

Informacje o czasopiśmie
Format
Czasopismo
eISSN
1898-0309
Pierwsze wydanie
30 Dec 2008
Częstotliwość wydawania
4 razy w roku
Języki
Angielski

Wyszukiwanie

3 Artykułów
Otwarty dostęp

How to write a good scientific paper

Data publikacji: 30 Mar 2017
Zakres stron: 1 - 2

Abstrakt

Otwarty dostęp

Toward a better prescription method for external radiotherapy

Data publikacji: 30 Mar 2017
Zakres stron: 3 - 7

Abstrakt

Abstract

Aim: The aim of the study was to compare several methods of dose prescription, the mean dose, the median dose, the effective dose and the generalized Equivalent Uniform Dose (gEUD).

Background: The dose distribution in the planning target volume is never fully homogenous. Depending on the dose prescription method for the same prescribed dose different biologically equivalent doses are delivered. The latest ICRU Report 83 proposes to prescribe the dose to the median dose in the PTV. Several other methods are also in common use. It is important to know what are differences of doses actually delivered depending on the dose prescription method.

Materials and methods: The study was performed for three groups of patients treated radically with external beams in Brzozow, over the 2012-2013 period. The groups were of patients with breast, lung and prostate cancer. There were 10 patients in each group. For each patient all metrics, i.e. the mean dose, the median dose, the effective dose and the generalized Equivalent Uniform Dose, were calculated. The influence of the dose homogeneity in the PTV on the results is also evaluated. The gEUD was used as a reference dose prescription method.

Results: For all patients, an almost perfect correlation between the median dose and the gEUD was obtained. Worse correlation was obtained between other metrics and the gEUD. The median dose is almost always a little higher than the gEUD, but the ratio of these two values never exceeded 1.013.

Conclusion: The median dose seems to be a good and simple method of dose prescription.

Słowa kluczowe

  • radiotherapy
  • dose
  • equivalent uniform dose
Otwarty dostęp

A study on the imaging characteristics of Gold nanoparticles as a contrast agent in X-ray computed tomography

Data publikacji: 30 Mar 2017
Zakres stron: 9 - 14

Abstrakt

Abstract

Aim: In the current study, some imaging characteristics of AuNPs were quantitatively analyzed and compared with two conventional contrast media (CM) including Iodine and Gadolinium by using of a cylindrical phantom.

Methods: AuNPs were synthesized with the mean diameter of 16 nm and were equalized to the concentration of 0.5, 1, 2 and 4 mg/mL in the same volumes. A cylindrical phantom resembling the head and neck was fabricated and drilled to contain small tubes filled with Iodine, Gadolinium, and AuNPs as contrast media. The phantom was scanned in different exposure techniques and CT numbers of three studied contrast media inside test tubes were measured in terms of Hounsfield Unit (HU). The imaging parameters of the noise and contrast to noise ratios (CNR) were calculated for all studied CMs.

Results: AuNPs showed 128% and 166% higher CT number in comparison with Iodine and Gadolinium respectively. Also, Iodine had a greater CT number than Gadolinium for the same exposure techniques and concentration. The maximum CT number for AuNPs and studied contrast materials was obtained at the highest mAs and the lowest tube potential. The maximum CT number were 1033±11 (HU) for AuNP, 565±10 (HU) for Iodine, 458±11 for Gadolinium. Moreover, the maximum CNRs of 433±117, 203±53, 145±37 were found for AuNPs, Iodine and Gadolinium respectively.

Conclusion: The contrast agent based on AuNPs showed higher imaging quality in terms of contrast and noise relative to other iodine and gadolinium based contrast media in X-ray computed tomography. Application of the AuNPs as a contrast medium in x-ray CT is recommended.

Słowa kluczowe

  • AuNP
  • contrast media
  • X-ray computed tomography
  • nanoparticle
3 Artykułów
Otwarty dostęp

How to write a good scientific paper

Data publikacji: 30 Mar 2017
Zakres stron: 1 - 2

Abstrakt

Otwarty dostęp

Toward a better prescription method for external radiotherapy

Data publikacji: 30 Mar 2017
Zakres stron: 3 - 7

Abstrakt

Abstract

Aim: The aim of the study was to compare several methods of dose prescription, the mean dose, the median dose, the effective dose and the generalized Equivalent Uniform Dose (gEUD).

Background: The dose distribution in the planning target volume is never fully homogenous. Depending on the dose prescription method for the same prescribed dose different biologically equivalent doses are delivered. The latest ICRU Report 83 proposes to prescribe the dose to the median dose in the PTV. Several other methods are also in common use. It is important to know what are differences of doses actually delivered depending on the dose prescription method.

Materials and methods: The study was performed for three groups of patients treated radically with external beams in Brzozow, over the 2012-2013 period. The groups were of patients with breast, lung and prostate cancer. There were 10 patients in each group. For each patient all metrics, i.e. the mean dose, the median dose, the effective dose and the generalized Equivalent Uniform Dose, were calculated. The influence of the dose homogeneity in the PTV on the results is also evaluated. The gEUD was used as a reference dose prescription method.

Results: For all patients, an almost perfect correlation between the median dose and the gEUD was obtained. Worse correlation was obtained between other metrics and the gEUD. The median dose is almost always a little higher than the gEUD, but the ratio of these two values never exceeded 1.013.

Conclusion: The median dose seems to be a good and simple method of dose prescription.

Słowa kluczowe

  • radiotherapy
  • dose
  • equivalent uniform dose
Otwarty dostęp

A study on the imaging characteristics of Gold nanoparticles as a contrast agent in X-ray computed tomography

Data publikacji: 30 Mar 2017
Zakres stron: 9 - 14

Abstrakt

Abstract

Aim: In the current study, some imaging characteristics of AuNPs were quantitatively analyzed and compared with two conventional contrast media (CM) including Iodine and Gadolinium by using of a cylindrical phantom.

Methods: AuNPs were synthesized with the mean diameter of 16 nm and were equalized to the concentration of 0.5, 1, 2 and 4 mg/mL in the same volumes. A cylindrical phantom resembling the head and neck was fabricated and drilled to contain small tubes filled with Iodine, Gadolinium, and AuNPs as contrast media. The phantom was scanned in different exposure techniques and CT numbers of three studied contrast media inside test tubes were measured in terms of Hounsfield Unit (HU). The imaging parameters of the noise and contrast to noise ratios (CNR) were calculated for all studied CMs.

Results: AuNPs showed 128% and 166% higher CT number in comparison with Iodine and Gadolinium respectively. Also, Iodine had a greater CT number than Gadolinium for the same exposure techniques and concentration. The maximum CT number for AuNPs and studied contrast materials was obtained at the highest mAs and the lowest tube potential. The maximum CT number were 1033±11 (HU) for AuNP, 565±10 (HU) for Iodine, 458±11 for Gadolinium. Moreover, the maximum CNRs of 433±117, 203±53, 145±37 were found for AuNPs, Iodine and Gadolinium respectively.

Conclusion: The contrast agent based on AuNPs showed higher imaging quality in terms of contrast and noise relative to other iodine and gadolinium based contrast media in X-ray computed tomography. Application of the AuNPs as a contrast medium in x-ray CT is recommended.

Słowa kluczowe

  • AuNP
  • contrast media
  • X-ray computed tomography
  • nanoparticle