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　　”但是，需要(yao)強調的(de)是應(ying)避免不必要(yao)的(de)CT檢查(cha)(cha)，尤其(qi)是孕(yun)婦、兒(er)童等(deng)特殊人群(qun)以及對(dui)甲狀(zhuang)腺、等(deng)特殊部(bu)位做(zuo)CT時要(yao)進行(xing)相應(ying)的(de)防護(hu)(hu)(hu)，目前各醫院對(dui)此類(lei)檢查(cha)(cha)均有(you)(you)(you)專門(men)(men)(men)(men)(men)(men)(men)的(de)保護(hu)(hu)(hu)措施。射(she)(she)(she)線(xian)(xian)防護(hu)(hu)(hu)鉛(qian)門(men)(men)(men)(men)(men)(men)(men)能(neng)有(you)(you)(you)效(xiao)杜絕(jue)這些問題，射(she)(she)(she)線(xian)(xian)防護(hu)(hu)(hu)鉛(qian)門(men)(men)(men)(men)(men)(men)(men)主要(yao)用(yong)(yong)于x、γ射(she)(she)(she)線(xian)(xian)和(he)中(zhong)子射(she)(she)(she)線(xian)(xian)防護(hu)(hu)(hu)屏蔽(160KV、200KV、250KV、300KV、400KV、450KV、鈷-Co60、銥-192)，其(qi)結構(gou)為鋼(gang)(gang)+鉛(qian)復合結構(gou)。 　　射(she)(she)(she)線(xian)(xian)防護(hu)(hu)(hu)鉛(qian)門(men)(men)(men)(men)(men)(men)(men)可分為雙扇對(dui)開(kai)(kai)防護(hu)(hu)(hu)鉛(qian)門(men)(men)(men)(men)(men)(men)(men)和(he)單扇防護(hu)(hu)(hu)鉛(qian)門(men)(men)(men)(men)(men)(men)(men)，其(qi)傳(chuan)動(dong)(dong)(dong)(dong)方式(shi)(shi)有(you)(you)(you)電(dian)(dian)動(dong)(dong)(dong)(dong)和(he)手(shou)動(dong)(dong)(dong)(dong)兩種(zhong)，電(dian)(dian)動(dong)(dong)(dong)(dong)門(men)(men)(men)(men)(men)(men)(men)可根據安裝條件和(he)用(yong)(yong)戶的(de)要(yao)求制作(zuo)(zuo)為上傳(chuan)動(dong)(dong)(dong)(dong)和(he)下(xia)傳(chuan)動(dong)(dong)(dong)(dong)兩種(zhong)方式(shi)(shi)，防護(hu)(hu)(hu)鉛(qian)當(dang)量和(he)門(men)(men)(men)(men)(men)(men)(men)體(ti)大小按用(yong)(yong)戶的(de)實際(ji)射(she)(she)(she)線(xian)(xian)劑量等(deng)級(ji)和(he)門(men)(men)(men)(men)(men)(men)(men)洞(dong)大小定制，產品(pin)、制作(zuo)(zuo)精美(mei)，電(dian)(dian)動(dong)(dong)(dong)(dong)射(she)(she)(she)線(xian)(xian)防護(hu)(hu)(hu)門(men)(men)(men)(men)(men)(men)(men)還配套門(men)(men)(men)(men)(men)(men)(men)機(ji)連(lian)鎖(suo)、工(gong)作(zuo)(zuo)指示燈、電(dian)(dian)離輻射(she)(she)(she)標(biao)志(zhi)牌等(deng)裝置(zhi)。 　　鉛(qian)門(men)(men)(men)(men)(men)(men)(men)的(de)種(zhong)類(lei)之多，我們該如何選用(yong)(yong)呢(ni)。鉛(qian)門(men)(men)(men)(men)(men)(men)(men)的(de)分類(lei)及選用(yong)(yong)門(men)(men)(men)(men)(men)(men)(men)型(xing)代 ：鉛(qian)門(men)(men)(men)(men)(men)(men)(men)有(you)(you)(you)三種(zhong)開(kai)(kai)啟方式(shi)(shi)：平開(kai)(kai)門(men)(men)(men)(men)(men)(men)(men)、手(shou)動(dong)(dong)(dong)(dong)推拉(la)門(men)(men)(men)(men)(men)(men)(men)、電(dian)(dian)動(dong)(dong)(dong)(dong)推拉(la)門(men)(men)(men)(men)(men)(men)(men)。門(men)(men)(men)(men)(men)(men)(men)扇骨(gu)(gu)架電(dian)(dian)動(dong)(dong)(dong)(dong)推拉(la)門(men)(men)(men)(men)(men)(men)(men)分為：木(mu)質骨(gu)(gu)架、輕鋼(gang)(gang)骨(gu)(gu)架、鋼(gang)(gang)質骨(gu)(gu)架。 　　射(she)(she)(she)線(xian)(xian)防護(hu)(hu)(hu)門(men)(men)(men)(men)(men)(men)(men)防護(hu)(hu)(hu)鉛(qian)當(dang)量和(he)門(men)(men)(men)(men)(men)(men)(men)體(ti)大小，按用(yong)(yong)戶的(de)實際(ji)防護(hu)(hu)(hu)要(yao)求和(he)門(men)(men)(men)(men)(men)(men)(men)洞(dong)大小定制。當(dang)防護(hu)(hu)(hu)鉛(qian)板為16mm厚仍(reng)不能(neng)滿(man)足使用(yong)(yong)要(yao)求時，可采用(yong)(yong)雙重門(men)(men)(men)(men)(men)(men)(men)解決。木(mu)質骨(gu)(gu)架鉛(qian)門(men)(men)(men)(men)(men)(men)(men)的(de)開(kai)(kai)啟方向(xiang)(內(nei)開(kai)(kai)、外(wai)開(kai)(kai))由(you)項目設計交待(dai)，在型(xing) 中(zhong)不做(zuo)表示。

　　在(zai)開啟(qi)鉛(qian)(qian)(qian)(qian)門(men)時(shi)(shi)(shi)(shi)，力度(du)要適中，盡量保持開啟(qi)和關閉時(shi)(shi)(shi)(shi)速度(du)均(jun)勻。平(ping)時(shi)(shi)(shi)(shi)在(zai)進(jin)出鉛(qian)(qian)(qian)(qian)門(men)時(shi)(shi)(shi)(shi)，忌諱急躁(zao)、，盡量避免的物體撞擊鉛(qian)(qian)(qian)(qian)門(men)或劃(hua)傷型材表面。在(zai)發現鉛(qian)(qian)(qian)(qian)門(men)在(zai)使用過程中，有開啟(qi)不靈活(huo)或其它異(yi)常(chang)情況(kuang)時(shi)(shi)(shi)(shi)，應(ying)及(ji)時(shi)(shi)(shi)(shi)查找原因，如果客戶自(zi)已(yi)不能排(pai)除(chu)故(gu)障(zhang)時(shi)(shi)(shi)(shi)，應(ying)及(ji)時(shi)(shi)(shi)(shi)與鉛(qian)(qian)(qian)(qian)門(men)生產廠家或供應(ying)商聯系，以便故(gu)障(zhang)能得到及(ji)時(shi)(shi)(shi)(shi)排(pai)除(chu)。 　　今(jin)日(ri)(ri)上(shang)(shang)海鉛(qian)(qian)(qian)(qian)門(men)價(jia)(jia)格(ge)普遍上(shang)(shang)漲(zhang)，今(jin)日(ri)(ri)上(shang)(shang)海鉛(qian)(qian)(qian)(qian)門(men)價(jia)(jia)格(ge)普遍上(shang)(shang)漲(zhang)。據蘭格(ge)鋼鐵云(yun)商平(ping)臺監測數據顯示：國內重點城市(shi)(shi)5.5普碳熱(re)卷(juan)均(jun)價(jia)(jia)在(zai)3961元，較(jiao)(jiao)昨日(ri)(ri)上(shang)(shang)漲(zhang)18元，較(jiao)(jiao)上(shang)(shang)周同期(qi)上(shang)(shang)漲(zhang)24元，較(jiao)(jiao)上(shang)(shang)月(yue)同期(qi)下(xia)跌(die)148元。 　　今(jin)日(ri)(ri)開盤(pan)，黑色(se)系夜盤(pan)平(ping)穩(wen)，上(shang)(shang)午盤(pan)中跳水，截至(zhi)收盤(pan)，黑色(se)系除(chu)螺(luo)紋鋼有小(xiao)幅(fu)上(shang)(shang)漲(zhang)之外(wai)皆出現下(xia)跌(die)，其中焦炭下(xia)跌(die)3.41%跌(die)幅(fu)更甚。現1805合約(yue)熱(re)卷(juan)價(jia)(jia)格(ge)報3775元，下(xia)跌(die)12元，跌(die)幅(fu)0.32%。今(jin)日(ri)(ri)熱(re)卷(juan)現貨市(shi)(shi)場價(jia)(jia)格(ge)仍然大部分地區(qu)出現小(xiao)幅(fu)上(shang)(shang)漲(zhang)，少(shao)數地區(qu)報穩(wen)，極(ji)個別城市(shi)(shi)有小(xiao)幅(fu)下(xia)跌(die)。 　　從地區(qu)來(lai)看，今(jin)日(ri)(ri)華東(dong)地區(qu)以及(ji)東(dong)北地區(qu)漲(zhang)勢較(jiao)(jiao)明顯，西南西北以及(ji)華南地區(qu)基本保持。鉛(qian)(qian)(qian)(qian)門(men)在(zai)進(jin)行清洗(xi)(xi)(xi)時(shi)(shi)(shi)(shi)嚴禁(jin)用普通的洗(xi)(xi)(xi)滌(di)劑或者是酸堿(jian)性洗(xi)(xi)(xi)滌(di)劑來(lai)清洗(xi)(xi)(xi)華南地區(qu)鉛(qian)(qian)(qian)(qian)門(men)市(shi)(shi)場依舊無明顯轉好。