CAs in the case of MRI, CT achieves images with high temporal and spatial resolution, which makes it an ideal technique for studying the morphology of vessels, their walls, surgical anastomoses, the airway, the lung parenchyma, and sometimes assessment of ventricular function.
Indications
The main indications for performing CT in patients with congenital heart disease include:
Evaluation of the coronary vessels: it not only evaluates their outlet and proximal path, but also their distal path, calcium deposits on their walls (calcium quantification or Calcium-Score) and is a better method than MRI to assess the complications secondary to surgical procedures where they are manipulated as in the Transposition of the Great Arteries.
Evaluation of patients repaired with stents or embolization coils
Patients with pacemakers, those not compatible with MRI.
Evaluation of vascular rings, since it better evaluates their relationship with the rest of the mediastinal structures, including the airway and the esophagus.
The indication in patients with claustrophobia is relative. In my opinion, with patience and adequate preparation they would withstand the MRI. If this is not possible, consideration should be given to performing an MRI with sedation, since in any case, CT, despite current technical advances, still involves a high dose of radiation get your tests from Lab Uncle.
In patients in a very serious clinical situation that is difficult to control, or in immediate post-surgical situations who need a rapid study (5-10 minutes).
Advantages and disadvantages of CT in relation to MRI
Advantages:
A shorter scan time. In children it allows less sedation / anesthesia to be used
It is compatible in patients with pacemakers and metallic devices.
Greater availability.
Simultaneous assessment of the heart and lung with their airways.
Disadvantages
High doses of radiation. It is the main limiting factor for performing a CT, since they will need multiple evolutionary controls throughout their lives and the radiation dose is added test after test.
Need for intravenous contrast. In CT, unlike MRI, it will always be necessary to administer intravenous contrast. The contrast used in CT is based on the chemical element iodine.
Less functional information (ventricular function) than MRI
In addition, vascular calcifications or surgical material can distort the image and make it difficult to see the lumen of the vessel well. Pacemakers and other metallic devices can also produce artifacts, although in the latest generation CT, all these artifacts are minor.
Also Read: Computed Tomography (CT): what is it for, advantages and disadvantages
Examples of images obtained in the CT
In the upper images on the left, we observe the small caliber of the (hypoplastic) aortic arch (arrow) and an enlarged ductus () in a 5-day-old patient with suspected aortic arch interruption. In the upper images on the right, we observe a complete double aortic arch, with branch asymmetry, the right side being larger in caliber () in a 6-year-old patient with respiratory symptoms. The 3D reconstruction of the airway shows the stenosis it produces in the tracheal lumen (*).
In the upper images on the left, we can see a coarctation of the aorta treated with a stent in MIP projection and its VRT-3D reconstruction in a 16-year-old patient.
In the upper images on the right we see a stenosis of the pulmonary veins (arrow) in a 1-year-old child (left) and a large ASD (right)
In the upper image on the left we observe a left coronary artery aneurysm and partially calcified wall (arrow) in an 8-year-old patient with Kawasaki disease.
In the upper image on the right we observe an anomalous origin of the left coronary artery in the pulmonary trunk and subsequent correction, with reimplantation in the aorta using a Dacron tube (Arrow) in a 3-year-old girl.
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富遊娛樂城新玩家優惠
體驗金$168元： 新玩家註冊即可享受，向客服申請即可領取。
首存送禮： 首次儲值$1000元，即可獲得額外的$1000元。
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推薦好友： 推薦好友成功註冊且首儲後，您可獲得$688元禮金。
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如何申請與領取？
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富遊娛樂城VIP會員
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娛樂城
探尋娛樂城的多元魅力
娛樂城近年來成為了眾多遊戲愛好者的熱門去處。在這裡，人們可以體驗到豐富多彩的遊戲並有機會贏得豐厚的獎金，正是這種刺激與樂趣使得娛樂城在全球範圍內越來越受歡迎。
娛樂城的多元遊戲
娛樂城通常提供一系列的娛樂選項，從經典的賭博遊戲如老虎機、百家樂、撲克，到最新的電子遊戲、體育賭博和電競項目，應有盡有，讓每位遊客都能找到自己的最愛。
娛樂城的優惠活動
娛樂城常會提供各種吸引人的優惠活動，例如新玩家註冊獎勵、首存贈送、以及VIP會員專享的多項福利，吸引了大量玩家前來參與。這些優惠不僅讓玩家獲得更多遊戲時間，還提高了他們贏得大獎的機會。
娛樂城的便利性
許多娛樂城都提供在線遊戲平台，玩家不必離開舒適的家就能享受到各種遊戲的樂趣。高品質的視頻直播和專業的遊戲平台讓玩家仿佛置身於真實的賭場之中，體驗到了無與倫比的遊戲感受。
娛樂城的社交體驗
娛樂城不僅僅是遊戲的天堂，更是社交的舞台。玩家可以在此結交來自世界各地的朋友，一邊享受遊戲的樂趣，一邊進行輕鬆愉快的交流。而且，許多娛樂城還會定期舉辦各種社交活動和比賽，進一步加深玩家之間的聯繫和友誼。
娛樂城的創新發展
隨著科技的快速發展，娛樂城也在不斷進行創新。虛擬現實（VR）、區塊鏈技術等新科技的應用，使得娛樂城提供了更多先進、多元和個性化的遊戲體驗。例如，通過VR技術，玩家可以更加真實地感受到賭場的氛圍和環境，得到更加沉浸和刺激的遊戲體驗。
百家樂是賭場中最古老且最受歡迎的博奕遊戲，無論是實體還是線上娛樂城都有其踪影。其簡單的規則和公平的遊戲機制吸引了大量玩家。不只如此，線上百家樂近年來更是受到玩家的喜愛，其優勢甚至超越了知名的實體賭場如澳門和拉斯維加斯。
百家樂入門介紹
百家樂(baccarat)是一款起源於義大利的撲克牌遊戲，其名稱在英文中是「零」的意思。從十五世紀開始在法國流行，到了十九世紀，這款遊戲在英國和法國都非常受歡迎。現今百家樂已成為全球各大賭場和娛樂城中的熱門遊戲。(來源: wiki百家樂 )
百家樂主要是玩家押注莊家或閒家勝出的遊戲。參與的人數沒有限制，不只坐在賭桌的玩家，旁邊站立的人也可以下注。
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探尋娛樂城的多元魅力
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娛樂城的多元遊戲
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許多娛樂城都提供在線遊戲平台，玩家不必離開舒適的家就能享受到各種遊戲的樂趣。高品質的視頻直播和專業的遊戲平台讓玩家仿佛置身於真實的賭場之中，體驗到了無與倫比的遊戲感受。
娛樂城的社交體驗
娛樂城不僅僅是遊戲的天堂，更是社交的舞台。玩家可以在此結交來自世界各地的朋友，一邊享受遊戲的樂趣，一邊進行輕鬆愉快的交流。而且，許多娛樂城還會定期舉辦各種社交活動和比賽，進一步加深玩家之間的聯繫和友誼。
娛樂城的創新發展
隨著科技的快速發展，娛樂城也在不斷進行創新。虛擬現實（VR）、區塊鏈技術等新科技的應用，使得娛樂城提供了更多先進、多元和個性化的遊戲體驗。例如，通過VR技術，玩家可以更加真實地感受到賭場的氛圍和環境，得到更加沉浸和刺激的遊戲體驗。
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