scholarly journals Three-Tesla Magnetic Resonance and Computed Tomography Imaging in Three-Dimensional Conformal Radiotherapy for Localized Prostate Cancer

2011 ◽  
Vol 01 (01) ◽  
pp. 1-8
Author(s):  
Gianluca Ingrosso ◽  
Alessandra Carosi ◽  
Elisabetta Ponti ◽  
Pierluigi Bove ◽  
Riccardo Santoni
Keyword(s):  
Prostate Cancer ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Three Dimensional ◽  
Conformal Radiotherapy ◽  
Localized Prostate Cancer ◽  
Computed Tomography Imaging ◽  
Tomography Imaging ◽  
Three Dimensional Conformal Radiotherapy ◽  
Three Tesla

scholarly journals Efficacy of a hydrogel spacer in three-dimensional conformal radiation therapy for prostate cancer

2020 ◽  
Vol 50 (3) ◽  
pp. 303-309 ◽  
Author(s):  
Mami Ogita ◽  
Hideomi Yamashita ◽  
Subaru Sawayanagi ◽  
Wataru Takahashi ◽  
Keiichi Nakagawa
Keyword(s):  
Prostate Cancer ◽  
Computed Tomography ◽  
High Risk ◽  
Seminal Vesicle ◽  
Three Dimensional ◽  
Conformal Radiotherapy ◽  
Computed Tomography Scans ◽  
Before And After ◽  
Three Dimensional Conformal Radiotherapy ◽  
Dose Constraints

Abstract Objectives We aimed to compare the dose constraints fulfillment rate of the three-dimensional conformal radiotherapy treatment plan before and after a hydrogel spacer insertion. Methods The planning computed tomography scans of 39 patients who received stereotactic body radiotherapy for prostate cancer were used. All patients inserted a hydrogel spacer and underwent computed tomography scans before and after spacer insertion. The three-dimensional conformal radiotherapy plans according to NCCN classification, low-, intermediate- and high-risk, were made for each patient. Clinical target volume included prostate and seminal vesicle 2 cm for high risk, prostate and seminal vesicle 1 cm for intermediate risk and prostate only for low risk. Three-dimensional conformal radiotherapy including a seven-field conformal technique with 76 Gy in 38 fractions. Dose constraints for rectum and bladder were V70 Gy ≤ 15%, V65 Gy ≤ 30% and V40 Gy ≤ 60%. Results Among 39 patients, 35 (90%), 19 (49%) and 13 (33%) and 38 (97%), 38 (97%) and 34 (87%) patients before and after the spacer insertion fulfilled rectum dose constraints for low-, intermediate- and high-risk plans, respectively. A hydrogel spacer significantly reduced rectum dose and improved the rectum dose constraints fulfillment rate in intermediate (P < 0.01) and high (P < 0.01), but no difference was found in low-risk plan (P = 0.25). On multivariate analysis, spacer use was associated with the higher rectum dose constraints fulfillment rate. Conclusions A hydrogel spacer reduced rectum dose and improved the dose constraints fulfillment rate in three-dimensional conformal radiotherapy plan. Although IMRT is the standard treatment, 3D-CRT using a hydrogel spacer may be a treatment option.

Surgical management of venous malformation in soft tissue with the guidance of magnetic resonance imaging and percutaneous sinus angiography/three-dimensional computed tomography imaging

2015 ◽  
Vol 31 (6) ◽  
pp. 397-402 ◽  
Author(s):  
Si-Ming Yuan ◽  
Chang-Sheng Zhou ◽  
Lei Cui ◽  
Yao Guo ◽  
Zhi-Jian Hong ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Surgical Management ◽  
Venous Malformation ◽  
Three Dimensional ◽  
Venous Malformations ◽  
Resonance Imaging ◽  
Computed Tomography Imaging ◽  
Tomography Imaging

Background Venous malformation (VM) is a common vascular malformation in soft tissue. Surgical management plays an important role in its treatment. The location, extent, and adjacent anatomy of the lesion are crucial information for the safety of operation. This study introduces the application of magnetic resonance imaging and percutaneous sinus angiography/three-dimensional computed tomography imaging in gathering above information. Methods A retrospective analysis was made in the patients with venous malformation from January 2012 to June 2014 in our clinic. All patients underwent magnetic resonance imaging and percutaneous sinus angiography/three-dimensional computed tomography imaging. The location, extent of the lesion, its draining veins, and the relationship with around tissues were showed. Surgical management was carried out in the lesions which were well defined, located in the superficial fascia without important vessels and nerves across it. The wound was repaired by skin flap or skin graft. Results A total of 13 patients underwent complete surgical removal of the lesions, including five type I venous malformations and eight type II venous malformations. Ten lesions were removed by undermining dissection, and the wound was repaired by the undermined flap. Three superficial lesions were removed together with the skin over it, and the wound was repaired by the skin graft. In the six months to two years of follow-up period, none of the recurrence of the lesion was observed. Conclusion Magnetic resonance imaging and percutaneous sinus angiography/three-dimensional computed tomography imaging can display abundant morphological details of venous malformation, which are helpful for the surgical management.

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