Evaluation of a total scalp electron irradiation technique

Able, C; Mills, Michael D.; McNeese, Marsha D.; Hogstrom, Kenneth R.

doi:10.1016/0360-3016(91)90751-o

Cited by 41 publications

(29 citation statements)

References 12 publications

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“…Teknolojideki gelişmeler doğrultusunda günümüze kadar farklı TSI yöntemleri tanımlanmış-tır (1)(2)(3)(4)(5)(6)(7)(8) .…”

Section: Discussionunclassified

“…Ancak alan sayısının çokluğu, ciltteki doz homojenizasyonu için bu alanlardaki kolimasyon ve alan sınırlarının kaydırılması gerekliliği bu yöntemin zorluklarıdır. Bu zorluklar pratikte uygulamayı güçleştirmiş ve daha kolay uygulanabilir bir TSI tekniğini gerektirmiştir (1)(2)(3)(4)(5) . Akazawa ve ark.…”

Section: Discussionunclassified

“…Beyin ve diğer risk altındaki organları koruyarak tüm skalpte tedavi edici dozun homojen dağılımının sağlanması TSI'ın hem planlanma hem de uygulamasındaki önemli teknik zorluklardır. Tedavi modalitelerindeki teknolojik gelişmelerle birlikte TSI'nda birçok farklı teknik tanımlanmıştır (1)(2)(3)(4)(5)(6)(7)(8) . Ancak, yoğun-luk ayarlı radyoterapi (YART) ve daha üst teknolojilerin kullanıldığı modalitelere sahip olmayan tedavi merkezleri için çok fazla farklı seçenek bulunmamaktadır.…”

Section: Introductionunclassified

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Palliative Total Scalp Irradiation Technique in Patient with Widespread Scalp Involvement of Angiosarcoma: Case Report

Özen¹,

Duruer²,

Şanlısoy³

et al. 2015

Terh

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ÖZETTüm skalp ışınlaması (TSI) yaygın skalp tutulumu yapabilen tümöre sahip hastalarda sıklıkla palyatif amaçlı kullanılmaktadır. Tüm skalpte tedavi edici dozun homojen bir şekilde dağılımı ile birlikte beyin ve diğer risk altındaki organların korunabilmesi TSI'ın hem planlanma hem de uygulamasındaki önemli teknik zorluklardır. Yıllar içerisinde tedavi modalitelerindeki teknolojik gelişmeler doğrultusunda TSI'nda farklı teknikler tanımlanmıştır. Fakat üst teknolojilere sahip olmayan tedavi merkezleri için çok fazla farklı seçenek bulunmamaktadır. Bu makalemizde yaygın skalp tutulumu olan 88 yaşında anjiyosarkom tanılı erkek hastamıza palyatif amaçlı (45 Gy/15 fr) uyguladığımız TSI tekniğini (karşılıklı 2 foton ve karşılıklı 2 elektron alanı kombinasyonu) ve tedavi sonuçlarını sunmayı amaçladık.Anahtar kelimeler: Anjiyosarkom, tüm skalp ışınlaması, palyatif tedavi ABSTRACT Total scalp irradiation (TSI) is often used for palliation in patients with tumors which may cause widespread scalp involvement. Protection of brain and other organs at risk with homogenous distribution of therapeutic dose through the whole scalp are technical challenges in planning and application of TSI. In accordance with technological developments, different TSI techniques have been described over the years. But, there are not a lot of different options for cancer centers without advanced technology. In this paper, we aimed to report TSI technique (combination 2 opposite photon fields and 2 opposite electron fields) for palliative intent (45 Gy/15 fr) and treatment results in a 88 years-old male angiosarcoma patient with whole scalp involvement.

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“…Teknolojideki gelişmeler doğrultusunda günümüze kadar farklı TSI yöntemleri tanımlanmış-tır (1)(2)(3)(4)(5)(6)(7)(8) .…”

Section: Discussionunclassified

Section: Introductionunclassified

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Palliative Total Scalp Irradiation Technique in Patient with Widespread Scalp Involvement of Angiosarcoma: Case Report

Özen¹,

Duruer²,

Şanlısoy³

et al. 2015

Terh

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“…In the electron technique, brain dose is low but the scattering of electrons on oblique surfaces can create unusual dose distributions and the effect of laterally scattered and backscattered electrons from the skull must be understood [5,6]. Dose-volume histogram is acceptable and coverage of the target volume is adequate but incidence of beam angle and field matching are the problem for combination of electron and photon technique [7].…”

Section: Introductionmentioning

confidence: 99%

Dosimetric Evaluation of The Tomotherapy, Non-coplanar and Coplanar IMRT Plannings for Total Scalp Irradiation

Us¹,

Kara²,

Yazici³

et al. 2015

Med-Science

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“…Many techniques have been reported to address this issue. Able et al (1) and Mellenberg and Schoeppel (2) used several matching fields and shifted the gap during the course of treatment. Sagar and Pujara (3) and Walker et al (4) used several overlapping fields to deliver a homogeneous dose at field junctions.…”

Section: Introductionmentioning

confidence: 99%

A simpler method for total scalp irradiation: the multijaw‐size concave arc technique

Inoue

Konno

Ogawa

et al. 2014

J Applied Clin Med Phys

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The lateral electron‐photon technique (LEPT) and intensity‐modulated radiation therapy (IMRT) are commonly used for total scalp irradiation. However, the treatment planning and irradiation are laborious and time‐consuming. We herein present the multijaw‐size concave arc technique (MCAT) as a total scalp irradiation method that overcomes these problems. CT datasets for eight patients previously treated for angiosarcoma of the scalp were replanned using MCAT, LEPT, and IMRT. The MCAT was designed with a dynamic conformal arc for the total scalp, with a multileaf collimator to shield the brain. Two additional conformal arcs with a decreased upper‐jaw position of the first dynamic conformal arc were used to reduce the cranial hotspots. The prescribed dose was 40 Gy (2 Gy/fraction) to 95% of the planning target volume (PTV, defined as the total scalp plus a 4 mm margin). MCAT was compared with LEPT and IMRT with respect to the PTV dose homogeneity (D5%–95%), underdosage (V < 90%), overdosage (V > 110%), doses to the brain, and the delivery time and monitor units (MUs) for single irradiation. We were able to formulate treatment plans for all three techniques that could deliver the prescription dose in all patients. MCAT was significantly superior to LEPT with respect to PTV dose homogeneity, overdosage, and underdosage, although MCAT was inferior to IMRT with respect to dose homogeneity and overdosage. The mean brain dose and high‐dosage volume of all three techniques were low, but IMRT provided larger volume to the brain than did the other two techniques in the low dosage region. In MCAT, the mean delivery time could be reduced by approximately half or more, and the mean MUs could be reduced by at least 100 compared to the other two techniques. MCAT can achieve total scalp irradiation with substantially fewer MUs and a shorter delivery time than LEPT and IMRT.PACS number: 87.55.D‐

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Evaluation of a total scalp electron irradiation technique

Cited by 41 publications

References 12 publications

Palliative Total Scalp Irradiation Technique in Patient with Widespread Scalp Involvement of Angiosarcoma: Case Report

Palliative Total Scalp Irradiation Technique in Patient with Widespread Scalp Involvement of Angiosarcoma: Case Report

Dosimetric Evaluation of The Tomotherapy, Non-coplanar and Coplanar IMRT Plannings for Total Scalp Irradiation

A simpler method for total scalp irradiation: the multijaw‐size concave arc technique

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