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yngeal carcinoma, 19 patients with head and neck cancer, including cancer, brain tumors, parotid gland tumor And so on. Thermoplastic mask and floor, Belgium Orfit pany39。s products。 MX8000 spiral CT, the Netherlands, Philips pany39。s products。 radiotherapy for laser systems, Germany Lap pany39。s products。 23 EX medical linear accelerator (with more than 120 of the leaf grating), Eclipse treatment planning system , Simulation machine, Portal Vision TM radioelectronic portal imaging device, image analysis software Varian pany39。s products are the United States. Methods image acquisition time set up a total of 76 cases of patients with access to the 147 sets of data. Intensity Modulated treatment of patients with the time distribution is 1 wk irradiation 5, 1 / d, rest 2 d, for a total of 32 times. With the 1st treatment When doctors involved in positioning, posture check the accuracy of each of the 1st treatment of fieldshoot all, a total of 76 group 1, the data of which 8 patients in the radiotherapy also for chemical treatment, body mass changes More, every week of field shoot one film, each have seven groups of data。 including six patients at the same time radiotherapy and chemotherapy, and little change in the quality of every 10 d shoot a film, radio field, each have Four groups of data。 five patients have radiotherapy and chemotherapy at the same time, but almost no changes in body weight, so only in the treatment of the 1st and final oneshoot of field, each of two groups of data. Remaining only in patients with radiation therapy , The only shot of the 1st of field film. image acquisition and parison DRR image is parable benchmark error in the location to do CT, scans of the clavicle start from the top to the bottom of the next 3 cm ~ 4 cm, to slice thickness 5 mm, from 5 mm layer plain, through Image transmission system will be to plan the system. After the pletion of the treatment plan, design and treatment center field with the verification field, are left before the wild and wild, the size of 15 cm 15 cm, respectively, each field is set to soft tissue and bone window of the window Effects, image storage to be DDR image workstation. EPID image is the image parison error in the treatment of the accelerator, a beam radiotherapy before the network through a verification system for wild scheme, set up machinery for the number jumped 2 Mu, dose rate was adjusted to 100 Mu / s, set rack of 0 and 90 degrees, and start EPID devices, took a bundle of field image, image storage to the workstation. By image processing software Vision image analysis, in each of the paper directory, storage, the DRR images and EPID image. In the system as two windows, placing a coincidence with the image, another place EPID image . Accordance with the matching of field borders need to pare the two images, making basically consistent with the two images. EPID image outlined in the more obvious skeletal anatomy tag, for example, in the wild image is sketched in the nasal septum, eyes, outlined in the wild side Transsphenoidal, occipital bone, vertebrae before the bow, after the bow, after the margin, such as vertebrae. Coincidence in the two images on display outlined by the tag, pared EPID image in the anatomy tag points and the DRR images in the corresponding anatomical point position Differences on the twodimensional plane by the direction of the location of migration. / P Positioning error of deviation from the positioning of the pendulum in the process of system error and random error, error in all that the average system error Σ, with all the standard deviation of error that random errors σ [1]. Analysis Numerical errors when using the International Commission on Radiation Units and measurement (ICRU) 62, [2] in the coordinates, a vector that the parties to the upward migration, which are X (lateral) said about the direction, the direction is left, Y (cranialcaudal) that the direction of the first leg, the first positive direction, Z (ventraldorsal) said Fubei direction, the direction is positive abdominal. the use of statistical software for data analysis.香料可以保護(hù)皮膚在輻射治療癌癥描述:姜黃素,一種物質(zhì)在咖喱長(zhǎng)期以來一直認(rèn)為,有健康的好處,似乎是為了保護(hù)皮膚,在放射治療,根據(jù)結(jié)果進(jìn)行試驗(yàn)研究,與小鼠。 (會(huì)議:美國(guó)社會(huì)為放射治療及腫瘤科) 常見的香料可以保護(hù)皮膚,在放射治療癌癥癌癥研究人員在羅徹斯特大學(xué)醫(yī)學(xué)中心發(fā)現(xiàn),姜黃素,一種物質(zhì)在咖喱長(zhǎng)期以來一直認(rèn)為,有健康的好處,似乎是為了保護(hù)皮膚,在放射治療。醫(yī)生說,雖然進(jìn)一步的研究需要,癌癥病人可考慮吃的食物與咖喱期間,他們的放射治療。 姜黃素,物質(zhì),使姜黃其黃色的顏色,是一種天然的抗炎化合物和科學(xué)家已經(jīng)表明它能夠抑制腫瘤血管生長(zhǎng)。這個(gè)過程中,所謂的抗血管生成,可以扼殺腫瘤。現(xiàn)在,詹姆斯威爾莫特癌癥中心的研究人員發(fā)現(xiàn),通過研究小鼠的姜黃素可以保護(hù)皮膚免受燒傷和水泡,往往發(fā)生在放射治療。 “這是意義重大,因?yàn)槠つw損傷是一個(gè)現(xiàn)實(shí)問題為病人進(jìn)行輻射治療其腫瘤,如果不含毒性,天然物質(zhì)可以幫助防止這種破壞和發(fā)揮更大的效力,我們的輻射, 那是得獎(jiǎng)的情況,說: ”保羅Okunieff ,海事處,行政放射腫瘤科在威爾莫特癌癥中心。科學(xué)家提交了研究結(jié)果的試驗(yàn)研究,在第44次年度會(huì)議的美國(guó)社會(huì),為放射治療及腫瘤科對(duì)周一, 10月7日,在新的新奧爾良。 該研究小組,所領(lǐng)導(dǎo)的伊凡丁,醫(yī)學(xué)博士,助理教授,放射腫瘤學(xué),研究的影響,不同劑量的姜黃素對(duì)皮膚的保護(hù)在小鼠體內(nèi)給予放射治療。差異在皮膚的損害是巨大的。 “有少得多水泡或燒傷對(duì)小鼠誰已獲得姜黃素, ”丁關(guān)根說。 在這項(xiàng)研究中, 200只小鼠給予三種不同劑量的姜黃素五至七天。在第五天,小鼠給予單一劑量的輻射和科學(xué)家,等待20天,以評(píng)估皮膚損傷。小鼠誰收到的姜黃素最小的皮膚損傷所造成的輻射??茖W(xué)家還發(fā)現(xiàn),該物質(zhì)會(huì)抑制發(fā)展新的細(xì)胞在該地區(qū)的腫瘤,從而進(jìn)一步的成效,輻射。 而醫(yī)生是不準(zhǔn)備說,姜黃素是答案,以防止皮膚損傷,研究人員相信,結(jié)果表明,有必要進(jìn)行更廣泛的研究。 研究人員計(jì)劃進(jìn)一步審議姜黃素及其組合與其他抗炎化合物,以確定哪些可能是最好的方法,以防止皮膚損傷,丁關(guān)根說。 “幾乎所有的癌癥病人誰獲得放射治療的經(jīng)驗(yàn),某種形式的皮膚損傷從輕度曬傷的所有途徑水泡這是痛苦的對(duì)許多人來說,”O(jiān)kunieff說。 “如果我們能夠找到一種簡(jiǎn)單的方法,以幫助防止這種情況,這將使治療有點(diǎn)容易” 。測(cè)定頭頸部腫瘤在調(diào)強(qiáng)放射中的擺位偏差,計(jì)劃設(shè)計(jì)中從臨床靶區(qū)(CTV)到計(jì)劃靶區(qū)(PTV)的外擴(kuò)邊界. : 隨機(jī)抽取76名頭頸部腫瘤患者,在治療時(shí)用電子射野影像裝置(EPID)拍攝射野片,將射野片和計(jì)劃系統(tǒng)中的數(shù)字重建射野(DRR)圖像片進(jìn)行誤差比較. 結(jié)果: 在左右、頭腳、腹背方向的擺位誤差分別是(177。) mm,(177。) mm,(177。) mm, mm, mm, mm. 結(jié)論: 對(duì)于頭頸部調(diào)強(qiáng)治療的患者, mm,頭腳方向和腹背方向需要2 ,擺位誤差沒有性的變化.,年齡4~68(中位45)歲,其中鼻咽癌57例,頭頸部腫瘤19例,包括喉癌、腦瘤、腮腺瘤等. 熱塑面罩及底板,比利時(shí)Orfit公司產(chǎn)品;MX8000螺旋CT,荷蘭Philips公司產(chǎn)品;放療專用激光系統(tǒng),德國(guó)Lap公司產(chǎn)品;23EX醫(yī)用直線加速器(配備120 葉多葉光柵),Eclipse治療計(jì)劃系統(tǒng),模擬定位機(jī),Portal Vision TM型電子射野影像裝置, 公司產(chǎn)品.. 患者調(diào)強(qiáng)治療的時(shí)間分布是1 wk照射5次,1次/d,休息2 d,共計(jì)32次治療. 患者第1次治療時(shí)醫(yī)生參與擺位,核對(duì)體位的準(zhǔn)確性,每人第1次治療都拍射野片,總共有76組第1次的數(shù)據(jù);其中8例患者在放療的同時(shí)還進(jìn)行化學(xué)治療,體質(zhì)量變化比較大,每周都拍1次射野片,每人有7組的數(shù)據(jù);其中6例患者同時(shí)進(jìn)行放化療,體質(zhì)量變化不大,每隔10 d拍1次射野片,每人有4組的數(shù)據(jù);其中5例患者也同時(shí)進(jìn)行放化療,但體質(zhì)量幾乎沒有變化,所以只在治療第1次和最后1次拍射野片,每人2組數(shù)據(jù). 其余患者只進(jìn)行放射治療,只拍攝第1次治療的射野片. ,在做定位CT時(shí),掃描范圍從頭頂部到鎖骨下端下3 cm~4 cm,以層厚5 mm,層距5 mm平掃,通過系統(tǒng)將圖像傳輸?shù)接?jì)劃系統(tǒng)中. 治療計(jì)劃完成后,設(shè)計(jì)和治療野同中心的驗(yàn)證野,正前野和左側(cè)野,大小15 cm15 cm,每個(gè)野分別設(shè)置為骨窗和軟組織窗的效果,得到DDR圖像存儲(chǔ)到圖像工作站上. EPID圖像是誤差比較的圖像,在加速器治療時(shí),出束前通過放療網(wǎng)絡(luò)系統(tǒng)調(diào)出驗(yàn)證野計(jì)劃,設(shè)置機(jī)器跳數(shù)為2 Mu,劑量率調(diào)整到100 Mu/s,設(shè)置機(jī)架為0度和90度,啟動(dòng)EPID裝置,出束拍下射野圖像,存儲(chǔ)到圖像工作站中.用圖像處理軟件Vision ,在每個(gè)患者的文件目錄下,存儲(chǔ)了DRR圖像和EPID圖像. 在系統(tǒng)中設(shè)為兩個(gè)窗口,一個(gè)放置重合在一起的圖像,另一個(gè)放置EPID圖像. 按照射野邊界匹配兩幅需要比較的圖像,使得兩幅圖像基本吻合. 在EPID圖像中勾畫比較明顯的骨性解剖標(biāo)記點(diǎn),例如,在正野圖像中勾畫鼻中隔、眼眶等,在側(cè)野中勾畫蝶竇、枕骨、椎體前弓、后弓、椎體后緣等. 在重合的兩副圖像中就顯示所勾畫的標(biāo)記點(diǎn),比較EPID圖像中解剖標(biāo)記點(diǎn)和DRR圖像中相應(yīng)解剖點(diǎn)的位置差異,就得到該平面二維方向上的位置偏移./P,用所有誤差的平均值