What is the calculated grid frequency with a lead strip height of 50um, thickness of 90um, and a width of interspace of 35um?

To find the grid frequency, it is essential to understand how it is calculated. The grid frequency refers to the number of lead strips or lines per centimeter in a grid used in radiography, which is vital for minimizing patient radiation exposure while ensuring image quality.

The grid frequency can be calculated using the formula:

[ \text{Grid Frequency} = \frac{1}{\text{Lead Strip Height} + \text{Interspace Width}} ]

In this case, the lead strip height is 50 µm, and the interspace width is 35 µm. To compute the grid frequency, we first convert these measurements into centimeters (since grid frequency is expressed in lines per centimeter):

• Lead strip height: 50 µm = 0.005 cm

• Interspace width: 35 µm = 0.0035 cm

Now, we add these two values:

[ \text{Total Height} = 0.005 , \text{cm} + 0.0035 , \text{cm} = 0.0085 , \text{cm} ]

Then, we take the reciprocal to find the grid frequency:

[ \text{Grid Frequency} = \frac