- Détails du magazine
- Format
- Magazine
- eISSN
- 1898-0309
- Première publication
- 30 Dec 2008
- Période de publication
- 4 fois par an
- Langues
- Anglais

#### Chercher

Accès libre

#### Pulmonary tuberculosis diagnosis, differentiation and disease management: A review of radiomics applications

Pages: 251 - 259

#### Résumé

Pulmonary tuberculosis is a worldwide epidemic that can only be fought effectively with early and accurate diagnosis and proper disease management. The means of diagnosis and disease management should be easily accessible, cost effective and be readily available in the high tuberculosis burdened countries where it is most needed. Fortunately, the fast development of computer science in recent years has ensured that medical images can accurately be quantified. Radiomics is one such tool that can be used to quantify medical images. This review article focuses on the literature currently available on the application of radiomics explicitly for the purpose of diagnosis, differentiation from other pulmonary diseases and disease management of pulmonary tuberculosis. Despite using a formal search strategy, only five articles could be found on the application of radiomics to pulmonary tuberculosis. In all five articles reviewed, radiomic feature extraction was successfully used to quantify digital medical images for the purpose of comparing, or differentiating, pulmonary tuberculosis from other pulmonary diseases. This demonstrates that the use of radiomics for the purpose of tuberculosis disease management and diagnosis remains a valuable data mining opportunity not yet realised.

#### Mots clés

- feature extraction
- pulmonary tuberculosis
- radiomics

Accès libre

#### Using of Laplacian Re-decomposition image fusion algorithm for glioma grading with SWI, ADC, and FLAIR images

Pages: 261 - 269

#### Résumé

#### Mots clés

- glioma
- laplacian re-decomposition
- susceptibility-weighted imaging
- diffusion-weighted imaging
- image fusion

Accès libre

#### Comparison of three methods for reconstructing 3D motion from 2D video recordings for low cost gait analysis systems

Pages: 271 - 277

#### Résumé

#### Mots clés

- gait analysis
- 3D motion tracking
- template matching

Accès libre

#### A comprehensive Monte Carlo study to design a novel multi-nanoparticle loaded nanocomposites for augmentation of attenuation coefficient in the energy range of diagnostic X-rays

Pages: 279 - 289

#### Résumé

_{2}O_{3}, PbO, Sm_{2}O_{3}, Gd_{2}O_{3}, WO_{3,} and IrO_{2} particles. Radiation shielding properties of Sm_{2}O_{3} and IrO_{2} nanoparticles were investigated for the first time in the current study.

_{2}O_{3}+WO_{3}+Bi_{2}O_{3,} Gd_{2}O_{3}+WO_{3}+Bi_{2}O_{3}, and Sm_{2}O_{3}+WO_{3}+PbO were selected, and their shielding properties were estimated. In the energy range of 20-60 keV Sm_{2}O_{3} and Gd_{2}O_{3} nanoparticles, in 70-100 keV energy range WO_{3} and for photons energy higher than 90 keV, PbO and Bi_{2}O_{3} nanoparticles showed higher attenuation. Despite its higher density, IrO_{2} had lower attenuation compared to other nanocomposites. The results showed that the nanocomposite containing Sm_{2}O_{3,} WO_{3}, and Bi_{2}O_{3} nanoparticles provided better shielding among the studied samples.

#### Mots clés

- nanocomposite
- radiation
- attenuation coefficient
- diagnostic X- rays
- MCNPX

Accès libre

#### Monte Carlo Calculation of linear attenuation coefficients and photon scattering properties of novel concretes loaded with Osmium, Iridium and Barite nanoparticles

Pages: 291 - 298

#### Résumé

^{60}

#### Mots clés

- osmium
- iridium
- composite shield
- nanoparticles
- linear attenuation coefficient
- MCNPX

Accès libre

#### Feasibility of output quality assurance considering gantry angle using “Stealth Chamber”

Pages: 299 - 302

#### Résumé

^{2} field size using a Stealth Chamber. Specifically, 10X and 10X-flattening-filter-free beams with dose rates of 600 and 2400 monitor units (MU)/min, respectively, were used. The Stealth Chamber was attached to the gantry head, and irradiation was performed every 45° for gantry angles of 0-315°. To evaluate the variations in the output constancy with respect to the gantry angle, the acquired values were normalized to the value corresponding to a 0° gantry angle. The obtained results were utilized to determine the correction factors for all gantry angles. To verify the correction factors, additional measurements were performed for five days.

#### Mots clés

- quality assurance
- gantry angle dependence
- reference chamber

Accès libre

#### Dosimetric accuracy of a cross-calibration coefficient for plane-parallel ionization chamber obtained in low-energy electron beams using various cylindrical dosimeters

Pages: 303 - 313

#### Résumé

_{d,w,Qcross} obtained in beam ≥ 9MeV gives 0.1 – 0.5% precision of dose reconstruction.

Without beam quality correction, 15 MeV N_{d,w,Qcross} is 10% lower than Co-60 N_{d,w,0}. Various EPOM shifts resulted in up to 0.6% discrepancies in N_{d,w,Qcross} values.

#### Mots clés

- cross calibration
- low-energy electron beams
- effective point of measurement
- PPC05 ionization chamber
- dosimetry in radiotherapy

Accès libre

#### Empirical method for modeling the percent depth dose curves of electron beam in radiation therapy

Pages: 315 - 321

#### Résumé

_{50} and R_{p} can be derived from the modeled straight line of 80% to 20% region of PDD. The same electron energy with different cone sizes was also modeled with the primary-tail function. The stopping power for different electron energies at different depths can also be derived from the parameters of N, µ and n. Percent ionization depth curve can then be derived from the percent depth dose by dividing its depth relevant stopping power for comparing with the original water phantom measurement.

_{0} - 88, N = 0.9975 E_{0} - 2.8535, LN(-µ) = -0.1355 E_{0} - 6.0986, respectively. Stopping power of different electron energy can be derived from n and N with the equation: stopping power = (−0.042 ln N_{E0} + 1.072)e^{(−n−E0·5·10−5+0.0381·d)}, where d is the depth in water. Percent depth dose was derived from the percent reading curve by multiplying the stopping power relevant to the depth in water at certain electron energy.

#### Mots clés

- percent depth dose modelling
- electron
- primary-tail equation