What Is This Tool?
This tool allows you to convert absorbed dose measurements from the legacy unit rad (rd) to the centigray (cGy), a standard SI-based unit. It helps standardize radiation dose values, ensuring consistency across medical, environmental, and materials testing contexts.
How to Use This Tool?
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Enter the absorbed dose value in rad (rd)
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Select rad as the input unit and centigray (cGy) as the output unit
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Click convert to get the equivalent dose value in centigray
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Review the result for use in radiotherapy, dosimetry, or radiation safety reporting
Key Features
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Simple and quick unit conversion from rad to centigray
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Based on standardized equivalence where 1 rad equals 1 centigray
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Supports conversion for radiation dose measurements in medical and industrial applications
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Browser-based tool accessible without installation
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Includes examples for easy reference and understanding
Examples
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5 rd converts to 5 cGy
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100 rd converts to 100 cGy
Common Use Cases
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Converting historical radiotherapy dose records to modern SI units
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Aligning radiation dose reports for occupational and environmental safety
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Calibrating and verifying therapeutic radiation beams in medical physics
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Evaluating radiation effects in electronics and materials testing
Tips & Best Practices
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Always verify the measurement context when converting dose units
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Prefer SI units such as centigray and gray for clarity and regulatory compliance
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Use this tool to harmonize legacy data with current medical physics practices
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Consider calibration and equipment differences when interpreting dose values
Limitations
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Rad is a legacy unit and may still appear in older documents but is less common today
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Numerical equivalence does not guarantee identical measurement precision between devices
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Conversion does not replace the need to follow current regulatory standards favoring SI units
Frequently Asked Questions
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What is the relationship between rad and centigray?
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One rad is exactly equal to one centigray (1 rd = 1 cGy), making the conversion straightforward.
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Why convert rad units to centigray?
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Converting to centigray standardizes absorbed dose measurements to the SI system, which is preferred in modern medical and radiation safety practices.
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Can this tool be used for all radiation dose conversions?
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This tool specifically converts rad to centigray and is intended for absorbed dose measurements; other unit conversions require different tools.
Key Terminology
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Rad (rd)
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A legacy unit of absorbed dose equal to 0.01 gray, quantifying radiation energy deposited per unit mass.
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Centigray (cGy)
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A unit of absorbed radiation dose equal to one hundredth of a gray (0.01 Gy), commonly used in medical physics and radiotherapy.
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Gray (Gy)
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The SI unit of absorbed radiation dose representing one joule of radiation energy absorbed per kilogram of matter.