هل الفحص بالأشعة المقطعية آمن؟ هل تزيد فحوصات التصوير بالأشعة المقطعية بالفعل من مخاطر الإصابة بالسرطان؟

إجابة من سكوت سي ليتين، (دكتور في الطب)

توجد صلة مباشرة بين اختبارات التصوير الطبية — بما في ذلك فحوصات التصوير المقطعي المحوسب (CT) — وزيادة العمر المتوقع وانخفاض معدلات الوفيات الناجمة عن السرطان. كما أن اختبارات التصوير الطبية أقل تكلفة وأكثر أمنًا بشكل عام من الإجراءات الباضعة، مثل الجراحة الاستكشافية.

وكما هو الحال مع فحوص التصوير بالأشعة السينية، يعرضك التصوير المقطعي المحوسب إلى قدر صغير وموجه من الإشعاع المُؤَيِّن. ويساعد الإشعاع على تكوين صورة لبِنى الجسم الداخلية. ويقدم الفحص بالتصوير المقطعي المحوسب صورًا أكثر تفصيلاً لأنواع أكثر من الأنسجة مقارنة بما تقدمه الأشعة السينية التقليدية، ويسمح ذلك للطبيب بالكشف عن العديد من الحالات المرضية وتحديد أماكنها.

يُستخدم التصوير المقطعي المحوسب لأغراض متعددة. وتشمل المساعدة في تشخيص حالة مرضية ما، وتوجيه الإجراءات الطبية مثل الخزعات بالإبر، ومراقبة فعالية علاجات معينة، مثل علاجات السرطان.

وفي حالة إجراء التصوير المقطعي المحوسب بجرعات منخفضة من الإشعاع، يصبح خطر الإصابة بالسرطان المرتبط به ضئيلًا للغاية، لدرجة أنه لا يمكن قياسه على نحو يمكن الاعتماد عليه. مع ذلك، ونظرًا لأن ازدياد خطر الإصابة يبقى أمرًا محتملًا، تنصح الكلية الأمريكية لطب الأشعة بعدم الخضوع لفحص تصويري ما لم تكن هناك فائدة طبية واضحة.

وتحث التوجيهات الحالية الأطباء على استخدام أدنى حد لازم من الإشعاع عند إجراء فحوصات التصوير. فإذا أوصى طبيبك بإجراء تصوير مقطعي محوسب، فاسأله عن الفوائد المحتملة لصحتك، والتي تفوق بشكل بشكل كبير عادة المخاطرة الضئيلة المحتملة بسبب الإشعاع.

11/03/2020 See more Expert Answers

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