When examining the lung fields of a normal CXR, the outline (silhouette) of the heart borders; the ascending and descending aorta; the aortic knuckle and the hemidiaphragms should be clearly visible. 1  All of these silhouettes, or structures, are in contact with a specific portion of the lung.
Perhaps the most important parameter is temperature â chicken eggs should be incubated at a temperature between 99 and 102 degrees Fahrenheit (99.5 is often considered to be ideal) and 50 to 65 percent relative humidity (60 percent is often considered the ideal).uring the final three days of incubation, the eggs should ideally be located in a slightly cooler (98.5 degrees) and more humid (65 percent relative humidity or greater) environment to facilitate successful hatching.
Chicken eggs have an incubation period of about 21 days and can be hatched using either a specialized incubator under carefully monitored conditions, or using a broody hen. Use these tips for hatching chicken eggs using both methods. Temperature: Chicken eggs should be incubated at a temperature between 99 and 102 degrees Fahrenheit (99.5 is often considered to be ideal). 2  Avoid temperatures outside the 97â103 Â°F (36â39 Â°C). 3  range. 4  If the temperature remains beyond either extreme for several days, hatchability may be severely reduced.