Which protective device is commonly used to shield sensitive organs during radiologic procedures?

The lead apron is the correct choice as it is specifically designed to shield sensitive organs from harmful radiation exposure during radiologic procedures. Lead is an effective shielding material due to its high atomic number and density, which significantly reduces the amount of radiation that can pass through it. By covering the torso and reproductive organs, lead aprons help protect against both scatter radiation and direct radiation exposure, ensuring patient safety while still allowing for necessary imaging.

Other protective devices listed, such as an X-ray blanket, while they may provide some form of protection, aren't as standardized or effective as lead aprons. Ultrasound gel is used to improve the contact between the transducer and the skin for ultrasound procedures but does not provide any radiation protection. Protective gloves are important for the operator's safety but do not cover the most sensitive areas of a patient's body, thus making lead aprons the go-to option for comprehensive protection in radiologic practices.